2.5L Golf/Rabbit. Does exhaust make a difference?

We chuck on an exhaust on this MK5 2.5L 5cyl and do a dyno comparison to see if it makes a difference. On top of releasing the amazing sound of the 07K we gained power as well. Score!
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[@COMotorsports]

@spindatt lied at first and told me 89oct... it wasn't. lol

[@dB_944]

I’ve run 87 in my B5 1.8T to “save money” and it ran like garbage. Put 93 (Indiana, sorry Canada) back in and it’s happy. Worth the money. Don’t be cheap, folks. 😊

[@jameshaulenbeek5931]

@@dB_944 I also noticed a big difference in my Mk7 1.8 Golf. I've heard it doesn't, but it's noticeable to me.

[@Tyler-ts2ld]

@@dB_944 what’s funny is I’ve ran 87 in my MK3 ABA Jetta ONCE. The rest of the week, it ran TERRIBLE. Finally got it down to 1/4 tank and filled it back up with premium. Ran like a dream after than. That was just a stock (minus catback) obd1 ABA.

[@paranormalextract4976]

Interesting topic, higher octane fuel and mileage. I have yet to see proof. 1-2 mpw isn't an increase. Especially when you find they filled up at different times of the day, different stations etc. Had this thought......fuel economy testing on the rollers. Idk if it would be good for the rollers running for that long continuously? 99% wouldn't care but I would haha. Awesome car, I have the exact same one.

[@NoNo-wy4rj]

Oh my putting the better gas in it is like night and day difference. It is so enjoyable to drive with high-grade gasoline.

[@martindeoliveira5128]

Indicator of a professional shop run by people with integrity “Sorting out the leaks so the 02 can read properly is going to add more power than the exhaust”. This is why I love this channel

[@Tyler-ts2ld]

Man those 2.5’s sound SO GOOD.

[@mrwilliams7086]

thank you 🤣🤣

[@jacobshapiro1278]

That’s why I swapped my gti to a 2.5 5 cylinder lol

[@DriftySwift]

​@@jacobshapiro1278fr?

[@randyguzy8042]

I have 2 theys red and a this exact one 😂🤣

[@k.thornton3469]

"It's missing a turbo "🤣.. my thoughts on the way to work everyday ..same 2.5

[@Freakezzz]

I’m on my 2nd 07k. Had a rabbit, now I have the Jetta. Exact manual spec. You may scoff at 22mpg, but these cars are national treasures.

[@nickcarriere8077]

they really are... one of the most reliable cars ive ever seen

[@07Klyfe]

Why second i need to know

[@EastDallasKicks]

@@07Klyfemost likely got tired of the rabbit being a smaller vehicle. I really can’t find a way to get comfortable safe. Feels like I have a side pillar blind spot and can’t get my mirrors in a comfortable spot. ACs also suck in these because the solenoid valve

[@CarelessGamer15]

I have mk5 Jetta in Portugal (the 2.5 was never sold in Europe) and I keep getting offers to sell it. It’s such a good car and understated. Well, at least until you put your foot down 😁

[@maxcaruso5390]

Happy to see more 2.5 content on here. Love the 5 cyl

[@davidshanaman4647]

my wife has a 2007 Rabbit 4 door that she loves. It has 165K miles and is leaking oil. I'm trying to convince her to keep it and if it needs a full rebuild so be it. Cheaper than new cars.

[@warbirdtbf]

Is the oil leak the infamous vacuum pump leak?

[@DSteel5408]

“I think it’s impressive to make this much power on 87”🤣

[@rehn1kri]

Most entertaining 150whp dyno video ever! Nice work everyone.

[@2liter8valveABA]

Intake, intake mani, and catless (if it isn’t) and tune will really wake this car up. Probably another 15-20whp/wtq to be had 👍

[@marchaslam9635]

it’s also probably 2k just for 15-20hp gains, at that point just build the head 😭

[@MiguelGarcia-vj7oo]

​@@marchaslam9635 just for the intake sound is worth it for the 07k. BUT if you think that's bad. Go buy a air-cooled 911. 20 hp is like 40k........ worst HP to cost out of any engine.......

[@dfreems]

Really enjoy both your channels! “Circles and dust” killed me! Haha

[@COMotorsports]

Xox

[@dirk5950]

The Gran Turismo throwback had me rolling. Good stuff.

[@VoyageRC]

07k! Love the comparison dyno runs.

[@garrettlison4992]

We love our '08 Rabbit and I've been itching to add some fun bits but because we like to pack our dogs into it, the less loud noises the better (for them anyways). Great video!

[@Radec74]

I recently purchased a stock clean 2009 rabbit 2.5. thanks for this video, I'm looking to do some upgrades,

[@davidalas77]

Incredible, I have a Golf 13 2.5. I'll remove the catback soon hahahha this will do. I hope for more rabbit 2.5 content

[@robertbrathwaite4191]

This dude right here!.. listen to your mechanic my God!

[@gottawatch1932]

Thank you for this video. Very easy to follow along with the dialogue. Have. 2012 2.5 manual/Ingen CAI , AWE Touring Exhaust. Now I’m going to run 91 octane because of this video thank you. Really wish you would of added the 91 for video purposes to show a gain/loss by using 91 octane.

[@COMotorsports]

Although we did run it with 91oct I can see in the logs how much timing is being pulled out which is how I know it would pick up more power with better fuel.

[@masonpugh3637]

Wow just by up grading the exhaust system need to this to my 2002 cabrio 3,5 sounds good

[@UngluckInc]

I said on IG 190ft.lbs..I was expecting 91oct and the header conversion...so good.

[@MrHotroddovr6]

The new exhaust sounds nasty!!!!!!

[@im.thinkin]

I miss my Rabbit lol, the 2.5 is solid and such a nice sounding engine.

[@COMotorsports]

Can sound amazing for sure.

[@dujuanjohnson5025]

🐰🐰

[@-redtango]

Got a Neuro Tuning tune on mine.. best dollar spent on that 2.5 so far

[@Kaos_roshi]

Please do a dyno run comparing the old exhaust manifold design to the new updated manifold design the 2.5L guys will thank you.

[@TokyoCollins]

Mannnn this shit hitting me in the feels same car same color I had! Holyyyy

[@tatialo37]

Cool!!! Billy Corgan is into vw's!!!

[@SrtBando.]

i’m so glad i got a 2.5

[@danbuchanan]

I’ve known Eric for a long time, and when he says he’ll “never” do something, it usually means we can peer pressure him into it eventually. I’m on team turbo. Ps: it looks like you guys had fun with this one

[@COMotorsports]

His not ready for boost. 🙂

[@dfletcher3052]

I had a 2008 navy blue MkV (two door rabbit in a manual)... I miss that little Kart... It was big on "Fun Factor"...

[@justinmcmackin9940]

Can’t wait for the 91octane dyno…..then the tune dyno……would make another great vid.

[@COMotorsports]

@spindatt isn't brave enough for a tune.

[@caveone-365]

You're absolutely correct about an NA car... Bolt-ons, tuning and some cams are the best/ only mods if you aren't throwing a snail on it. O7K FTW! There's a reason they're one of my favorite 'newer' VW/ Audi powerplants. Even when I was turning wrenches at the multiple stealerships I was at and the O7K was brand new there were like no issues with them. They're super reliable and the sound!!! Yeah 87 is trash. Throw some premium in it and the car will thank you. Not to mention the difference internally compared to a car that's been run on shit gas to one ran solely on premium. Here in NY we have 93 and that's ALL I EVER RAN. Not just on a car with a tune or a chipped EPROM where it's mandatory but everything will benefit from the better fuel. I think Spinni needs to throw a 3071 or similar 'SpinniBOI' on that thing. Keep it close to stock on the outside with a set of lightweight wheels/ sticky tires, some coilovers/ bushings, brakes and it'll be a sleeper, looking like it's basically a stock 2.5 Golf. Magnaflow makes one of the best aftermarket/ universal application mufflers. They last a while, are cheap, and sound great. Same thing with the Vibrant 'Stealth' cans. Another great choice. Just switching to those mufflers/ mandrel/ larger diameter piping, and no crush bends makes a huge difference. Good vid, definitely enjoyed it. Appreciate the share!🙂💪👍

[@COMotorsports]

Thanks for the comments. I don't think I'll ever talk him in to boosting it. Oh well we have mine to look forward too.

[@robertpaupard1265]

You Guy's are awesome... FRIENDS!! very funny ;(

[@flipgurujn]

Damn I use to own that car but kept it stock. Didn't know it would sound that great with an aftermarket exhaust and that it would gain that bit of power.

[@COMotorsports]

The 2.5L is one of the best sounding VW engines. It just needs some attention is all.

[@snoopdaclown]

It made what it's quoted at with the 87. Quoted at 150 with 06-08.5, so running better fuel would get a little more power. And people wanted to say the car was tuned from factory with 91 octane if that's the case it wouldn't make 150hp on 87octane.

[@COMotorsports]

150whp is about 173 crank hp.

[@raymondmcfloss6225]

I have the AWE Track exhaust for it .. Sounds amazing.. Lil baby v10

[@20vtechnik]

I had a 2.5 2013 passat (until it was totaled in a wreck). I wanted to buy the car back so i could work out a swap in my 84 4000s quattro. To bad the price far exceeded the cost of the engine... It would have been a challenging (for me) but a rewarding adventure. Still havent given up! The 07k is a really good engine!

[@lmarcotte7057]

Got to do this to my mk6 wagon

[@PrincePisces]

Just bought a rabbit manual 2.5 with a Tuned Injen air intake and a borla exhaust system it’s a great so far only issues and if I can get help. Sometimes on neutral it revs from 800rpm to 1500rpm without me hitting gas

[@COMotorsports]

If it's a maf car you have a leak.

[@Carstuff111]

From the perspective of someone that personally does not like modern era VWs after working on them for a bit in a dealership... I will admit I like the 2.5L 5. And out of the cool stuff I did get to drive (because most modern VWs are great to drive) the one car I would own personally is a 2.5L Rabbit. I drove one and was in awe of how fun it was without trying. Also, I do love the pre-Dieselgate TDI.... When I got 52 miles per gallon out of a Passat on the interstate at 70-80 MPH, with NO lack for acceleration in 6th gear.... I fell in love.

[@andrelariviere9425]

Hey I have a turbos mk5 rabbit and I was looking into doing the awd swap and would love if you made a vid on it!

[@IntegraTypeSPerformance]

Just picked one of these up. She needs an exhaust. Is this exhaust something you sell? Subscribed! Awesome channel!

[@Slowwagonftl]

Sounds like an NA RS3… 👀 Which is exactly where that motor came from IIRC

[@Dap-Racing]

this is foreshadowing for whats to come

[@walter68bug98]

I have a 13 Jetta 2.5 with 6 speed auto it’s a super reliable daily driver and is decently quick.I want to do a AWE exhaust on it

[@COMotorsports]

Smart choice

[@crw8286]

Its the close up of the bird shit for me 💯

[@COMotorsports]

B-roll professional's

[@hyper8545]

I had a rabbit before my mk6 gti ^^

[@jamesgeorge4874]

At about 4000, the 5 pot really shows it's harmony, it's roughness on the bottom gives way to a howl, that sounds angry, I daily a T5 Volvo, it sounds glorious, I'm sure the iron block VW 2.5 could push 400 HP with the right turbo, before you get in the danger zone.

[@carlospacheco8640]

You do realize that Iron Block are much much stronger than any other. The block can handle well over 800whp. Bluewater did 820whp with a stock block.

[@jamesgeorge4874]

@@carlospacheco8640 it ain't about the block, skippy, it's the rods and pistons. The tune better be spot on, the higher the output on OEM bottom end, the more critical, and if the ring gap isn't opened first, I suspect that would be the first major issue, actually. Frankly, "the block failed" is the _least_ likely problem you are going to hear about _ANY_ engine, except maybe a Northstar....

[@its_cyfa]

Do brake and suspension but you MUST Turbo this car. Those engines are awesome turbo,d

[@nickkramarczyk6282]

nice a sage green 2 door. pretty rare

[@de_fatherland6467]

quite an interesting engine option for a golf 5 , i think only us market got that engine

[@COMotorsports]

Came in both the MK5 and MK6 on North America. They're everywhere and engines are $200. Lol

[@NickBuenoo]

@@COMotorsports I saw some engines for cheap a while back and last night I checked they were 1000 bucks with 150k miles !! My rabbit has 175k Link an engine please

[@NyksWyldMynd]

Love to get my mk6 TDI on there and make a whopping 140 hp haha

[@MrHotroddovr6]

Put a tune on the damn thang!!!!

[@sleepergli3080]

I wish CO motorsports had a shop here in Missouri. 😭😭

[@k.thornton3469]

I feel you just over the creek in Illy!!!

[@sleepergli3080]

@@k.thornton3469 whats up neighbor lol but yea its a bummer because I sure know what I want done and its hard to trust shops. Als I do have to say that highway 64-40 on the ill side has some leg stretching benefits

[@TeamBlackScrapRage]

What kind of exhaust did he buy for the 07K engine?

[@BrodeyDoverosx]

Can you please log and show the difference between 87 and 91 octane? This series could be really great to show all of these little things.

[@COMotorsports]

It's the nature of the beast. More timing pulled with 87oct. Less timing pulled with 91oct. So overall more timing means more power.

[@BrodeyDoverosx]

@@COMotorsports 100%. I’m a tuner btw, just asking to show the difference before/after for that KZbin entertainment value.

[@PrincePisces]

So should I start putting 91? I’m currently on 87 I have injen air intake and awe exhaust

[@MyWatchIsEnded]

​@@PrincePiscesI ran my VW Rabbit with regular 87 and with 91 and the car is significantly faster with 91. According to the internet, "you can only achieve maximum horsepower using premium". I can attest that the car is faster with 91 octane versus the 87.

[@hamradiohack]

I agree. Because i dont think it will improve that much. I feel the 87 91 92 is a bunch of bs. Wasted $ but i could be wrong. 😮😂

[@pardonthedank]

what exhaust system did you use? any links?

[@workingmanaudio2754]

07k cars are tuned for 87 or premium. In the owners manual it’s says, for best performance use premium, but 87 is the minimum requirement. My 2.5 loves 91. Feels weaker with 87.

[@COMotorsports]

Yes 87, you can run 87 no problem on this car as you stated. But when chasing gains it is not ideal.

[@vinvega9058]

I hope you get into this thing cuz I really kinda want to get one and am curious

[@andrewbrodie8026]

What year is the rabbit? I have a neuspeed pflo that you guys could also compare if it would work

[@roybamford8698]

Hi mate great video can I ask you a question I’m thinking of doing a secondary set of injectors on my mk5 golf tfsi 2.0 I know on one of your videos that you were talking about doing it can I ask how or what you need to do it ? Or do you have a video of you doing it and if you do could you send me the link to the video cheers 👍

[@COMotorsports]

The key is figuring out what you want to use to control them.

[@christopherbell7561]

The uk never got that engine. First time I have ever known about it!

[@COMotorsports]

It's really good and everywhere here.

[@Jerzyboii908]

Need to convince him to get a intake manifold and tune, they are extremely restrictive. They wake up with the short runner and tune from IE. Apart from that it be a good start into modifying these.

[@NickBuenoo]

👌👌

[@jeffersonminaya8328]

Hope to see more 5 fly surf

[@gottawatch1932]

Yes we wanna see that video and the dyno run of those results.

[@Cenxuia]

yeah i have a 2012 2.5 and i didn’t realize until i was looking at it. the whole damn intake system is restrictive as hell. i’m definitely getting the intake manifold and short ram intake kit for it from IE

[@josephmuniz9959]

Hey guys LOVE YOUR CHANNEL. So I have a 2010 Jetta 07k that’s stock. I wanna get it to 200-220 hp and wondering what you would recommend what would be the best to get me there? I don’t really want to turbo it, is it possible to get there without a turbo? Thanks for any suggestions

[@COMotorsports]

The most you will get is with upgraded intake manifold, headers and software to match. Otherwise turbo it.

[@workingmanaudio2754]

Run NGK 5960 plugs. It will pull even more timing. OE laser platinum for 05-07 is too hot.

[@AlanSutton]

I have the same car. It gained 5 hp with exhaust , but only up top.

[@luckycharms9462]

What exhaust was put on? I’ve also got a few leaks in my exhaust and think that’ll fix it

[@dB_944]

I’d love to swap an 07k in my B5 A4. Too much work for that swap.

[@FiveWaveMedia]

He will be able to push 200whp and wtq if he were to install the stage 2 intake manifold and the mk6 2.5 header or make a little more with the equal length header. I make 165whp and 180wtq on a tune with intake and exhaust.

[@HandE2Go]

200 at the wheels? with just an im/tune/headers/exhaust.. i think it would be close to 190. 200 sounds like 8psi on the stock mani

[@FiveWaveMedia]

@@HandE2Go with stage 2 which includes intake manifold and past 200 with a equal length header. Stage one is 50hp less.

[@VE1N_instinct]

Hey I’m 18 and this exact spec is my first car I wanna know what kind of first engine mods should I do, I already have it lowered on perfect ride height

[@mikegreen2229]

I can’t wait to see the laughs when I bring my 58 Beetle supercharged/EFI “40 hp” to the dyno. I’m hoping I will be the new low hp record. I’m thinking 70hp/95 lb ft? But percentage wise over stock, that’s a lot for a driver

[@COMotorsports]

We just had a really crappy one on there.. it'll be hard to beat. lol

[@spencer1320]

Man this makes me miss my 06 Rabbit manual! 🥺 R.I.P you need a cold air intake and a lightweight crank pulley dogbone mount short shifter 🤘 I was at 185 to 190!

[@gottawatch1932]

That Hp from just those mods?

[@AnimeLobo23]

@@gottawatch1932it’s N/A so it’s harder to maker power out of the engine

[@righteous247]

Needs more goodies

[@hsproyaya]

The 2.5 sounds so much better than the 2.0

[@COMotorsports]

Correct.

[@Reaper1008]

I have a 2016 Veloster turbo.. and people say I am wasting money by using 93 octane.. But that's all I put in it.

[@ThePeavey23]

I have a 2.5 2007 rabbit that I use for just work, I beat that car every day and it just eats anything I give it.. I would love to get it tuned but honestly the little thing I sent worth paying for the service. I am in upstate ny an I do see that your in Canada 😊

[@COMotorsports]

Great engines for sure.

[@relicgamer2137]

Why would you put a slower detonating fuel in a n/a ? Do these have high compression? My experience is high octane detonates slower and you use that for force induction or high compression engines.

[@COMotorsports]

Although I agree, it's all it calls for from factory.

[@jorgesalas4314]

I'm trying to replace the exhaust on my 07 Rabbit. What are some good brands and how much should is a good price to pay for the part and labor?

[@COMotorsports]

All depends on quality of parts, and labor rates in your area. Also expect that the studs are rusted to nothing (depending on where you are) so expect some extra time for that.

[@runawaytowtruck]

👍🏾

[@johnmoser2689]

Low octane fuel causes premature detention due to the high compression rate... which eats at the piston face Costs more in the long run by not buying the correct fuel

[@relicgamer2137]

Yeah but is the 2.5 a high compression engine? Especially with higher miles?

[@johnmoser2689]

@relicgamer2137 the 2.5 is 10.8 to 1 compression ratio which is considered high compression so yes without the correct octane you'll experience detonation This is the reason when putting a turbo on a naturally aspirated VR engine we use a head spacer with two head gaskets to drop compression to around 8-8.5 to 1 so there's room for boost

[@marktorres3712]

What exhaust y’all go with?

[@drdanimalsize]

I tried to find the answer in the comments... What exhaust is that?

[@myshots101]

I have a question. What size tubing is the oem pipe vs the new one? Or were they both the same size? You mentioned a new exhaust but didn't say anything about the diameters. So I'm just curious.

[@COMotorsports]

2.5" on this one. Stock is smaller.

[@myshots101]

@@COMotorsports ok thanks. I think his car is a 2007 since my rabbit is also a 2007 and according to the specs this year makes 150 hp. I believe the 2008 they changed to the 170hp. My car is about the same as his, all stock but 4 doors.

[@COMotorsports]

@@myshots101 There is a difference between wheel hp and crank hp... keep that in mind also.

[@myshots101]

@@COMotorsports I stand corrected. I guess I was just thinking of the year specs when I heard 150hp. By the way great videos. I have just started watching your channel.

[@COMotorsports]

@@myshots101 thanks, appreciate you following along.

[@hamradiohack]

I just got a 08 2.5 5 speed. Im a truck guy with the bad roads in northern Arizona. Ive owned many vehicles over the years. I just want slow and reliable and 29mpg 😂😂 I im used to torque and turbo and diesel-powered trucks. This car has torque but its slow if that makes sense 😢

[@COMotorsports]

It's basically the most base module VW offered, all of what you're saying is expected lol

[@hamradiohack]

@@COMotorsports i like the gas milage for sure. These cars dont seem to be real common herw

[@johnmoser2689]

Watching this episode another time it still drives me crazy that spinny won't put the correct octane in it... it clearly says to do so in the owners manual and the backside of the fuel door Doesn't make sense to starve it

[@00061]

What exhaust setup is that?

[@TheBlad12345]

I thought later 07k had 170hp stock. Bit dissapointing. But that engine sounds great with new exhaust.

[@COMotorsports]

This is measured at the wheels, which is different then crank HP.

[@connerolann1533]

Thats 08 + models

[@blakeashton2002]

What’s type of exhaust is this I have been needing one for my 2.5 2011 that’s not over 700 dollars

[@COMotorsports]

Good luck, metals expensive

[@masonpugh3637]

I do use the best fuel possible I can and my vehicle even though it's just a 2.0 ABA non Turbo ABA non Turbo

[@bassgotit11]

What exhaust was it?

[@mooseknuckle8334]

I ran high octane fuel, the highest that Canada offers from the pump, and it did nothing but fawk with my mk4 golf's 02 censors. I currently run a mk5 09 rabbit and have yet to put "supreme" in it for fear of the same thing happening.

[@COMotorsports]

That's a coincidence, and nothing more.

[@mooseknuckle8334]

@@COMotorsports cool beans, thanks for the info.

[@benjamindorion5021]

Where did you buy the exhaust?

[@COMotorsports]

CO Motorsports

[@SNL92100]

owning a euro and buying primo, this is the way.

[@MyerShift7]

I loved my 5-speed 3-door 2008, but definitely not its electrical components! VW pushed me to Toyota.

[@dylanhendricks7267]

Can all vw Mk5 models be tuned

[@COMotorsports]

I would say yes, in NA anyways.

[@anonlincracing2484]

Didn't even know vw did a 2.5 litre golf

[@COMotorsports]

A lot of them. These engines are pennies around here.

[@jerrysroka997]

You gents planning on going to imports vs domestics in Maryland next week?

[@COMotorsports]

HECK YES!!!!!!!!!!!!

[@jerrysroka997]

@@COMotorsports bringing any merch, shipping to the US is insane.

[@COMotorsports]

@@jerrysroka997 email us with what you want. We can bring it.

[@jerrysroka997]

@@COMotorsports sent email let me know if I need to place order online

[@COMotorsports]

@@jerrysroka997 Hey Jerry, I had emailed you back, maybe it went to your spam or maybe you're just not interested anymore. However we're leaving in a couple of days and if you're still interested in getting something let us know what and what sizes ASAP.

[@AlanSutton]

If you want to hear this car with stage 2 tune and exhaust, I have videos up.

[@ford_squad2427]

do you guys remote tune?

[@COMotorsports]

All depends on the setup.

[@ford_squad2427]

@@COMotorsports 2010 audi s4 stock with headers and no cats 3 inch exhaust from headers back

[@COMotorsports]

@@ford_squad2427 there's endless OTS files that will work perfect

[@loganbushong1305]

This guy needs an IE intake manifold

[@riseagainst816]

What can these engines make with a good tune?? Don’t know too much about the 2.5 😅

[@COMotorsports]

They're amazing boosted is what I will say.