LLY Duramax 4 Inch Strait Pipe VS 5 Inch Strait Pipe! Which One's For You?

[@armanciolamoureux7659]

One of the best videos I've seen in a while. Minimum talking and all my questions have been answered by the end lol

[@RadMachines]

Thanks!

[@695noah]

The white one was most definitely running a hotter tune. Should’ve ran a similar tune to make it fair.

[@RadMachines]

I totally agree with you on that. The reason I ran a hotter tune is so the truck spools up faster. But it sounds about the same in stock tune!

[@Thechampion124]

It’s pretty fair. Same exact truck same brand exhaust. Find a better video

[@greysonprince4827]

My 2008 GMC Sierra has 5 inch straight pipe and it sounds great, and my 2014 Chevy Silverado has 4 inch straight pipe and it also sounds great, I just love Duramax's in general when they are deleted and tuned😂

[@RadMachines]

I also have a 2014 lml tuned and deleted with 4 inch strait pipe sounds amazing!

[@LESLASLESLAS]

I have a ‘07.5 Sierra tuned and deleted with 4” and have been considering converting to 5”. I think it has a deeper tone. I also have a ‘11 Silverado tuned and deleted, that has 968,xxx miles on it.

[@ChingoMandinguez]

Great video, nice straight ahead comparison, no b.s. well done.

[@RadMachines]

Thanks!

[@mattt525]

I've got a 4" on my 05 LLY cateye with a small straight through muffler/resonator back to 4" sounds really good little deeper note then straight 4" but not as loud as 5". Its a work pickup so I hate the drone at highway speeds. You guys should add the small muffler to the 4" it will sound a lot better afterwards

[@S1XTY7]

Good to know, picking up a CCSB LBZ this weekend with a 4" straight. We'll see how much different it is from my LB7 with 4" and muffler.

[@leonardromero435]

Can you post the link where you bought it please ?? The 5 inch

[@shaneorourke8318]

Great comparison guys

[@greysonprince4827]

If you live in Michigan and want to get your Duramax tuned and deleted, take it to GreatLakes-Motorsports, they will make them things run wild. My 08' has a stage 1 tow tune and I got it to 135 with ease, my 14' has a stage 2 and got that to 145 with ease as well

[@RadMachines]

Im in Washington! So thats a ways.

[@delilahzx10r47]

I'm in Michigan how much did they charge to delete yours

[@holstonkennedy4136]

This is the video I was looking for a few months ago when I was deciding on the 4 or 5 I went with the 4 because of me hauling equipment and I didn't was it screaming at me the whole time.

[@RadMachines]

Yea that's a very good point it you haul stuff 4 inch will probably be better for sure!

[@raceboy0002]

After running the 4" for a year would you go with 4" again or would you go with 5"? I do a lot of hauling to and I'm trying to decide if I want 4" or 5". I also wonder will 4" keep slightly more back pressure for more boost?

[@taylorh3930]

5" takes the win all the time. I'm going to have to custom build a full single 5" system for my 6.5 turbo diesel as the don't sell a 5" kit only a 4" 😥

[@RadMachines]

I agree 👍

[@taylorh3930]

@@RadMachines The 6.5 diesels sound like crap with the 4" wish I had the money for a Duramax but being a small business owner in Hitler Trudeau controled Canada it's though times 😥

[@giovannibott7242]

I got a 4” with a 5” tip. Sounds good

[@RadMachines]

Both systems sound good for sure!

[@fewestbark970gaming2]

man this makes me want to get a duramax so bad

[@RadMachines]

There amazing trucks!

[@zachreece8410]

It’s fun until you have to work on them lol.

[@hunterchurch5698]

Yo man I own this truck now how do I get ahold of you ?

[@RandomStuff-zt6qf]

Now are these trucks both deleted as well? I want to delete my '20 Duramax mostly to get rid of the EGR BS, and I like the louder turbo sound, but I don't want the truck stupid loud on the highway because I do a ton of highway towing and in/out of campgrounds a lot.

[@codybrackett812]

.... welp. The 4" kit is my pick. But.. are these otherwise stock?? All that tourq and THATS a burn out?.. granted 35/37.. but ok.

[@usarmy500]

What lift is on the white truck and the silver truck

[@ramiritoorozco4649]

Mine 6.6 duramax 5 inch down pipe

[@kanewannell4890]

both : eat sleep dream duramax

[@RadMachines]

Right right

[@streetbikebilly2597]

Why 5 inch, the downpipe can only be upto 3 inches before it hits the cab

[@GMCJay_lly]

It's a diesel thing

[@johnnyringo2690]

Little late to the party but the 4” sounds louder

[@RandomStuff-zt6qf]

Also, do either of the trucks have a muffler?

[@251suzuki]

What's the suspension/wheels and tire setup on the white truck?

[@RadMachines]

We made a whole video about the white truck. check it out on our channel!

[@PSExcavationsLLC]

Hard one to call, both sound great! I have an LBZ and thinking of building a custom exhaust, but really not sure, 4" or 5" and what muffler and where? I tow heavy so don't want too much drone

[@ac60hz120]

No muffler

[@user-mv2wc5ky9s]

The burnouts wegre for testing purposes only😂

[@gabeschepers5864]

I have the 5 inch no muffler with the downpipe you can hear the turbo a lot better.

[@RadMachines]

What kind of down pipe do you have?

[@gabeschepers5864]

@@RadMachines MBRP 3” down pipe to 5” exhaust. I did it right when I did the exhaust because I was only messing with the exhaust one time only.

[@RadMachines]

Yea exhausts are not the most enjoyable things to do especially when they are rusted on. Maybe on my next truck ill do a down pipe.

[@bigbucksbigtrucks1722]

@@gabeschepers5864 did you get the 5 inch cat back? MBRP no longer had a 4-5inch straight pipe that I can find

[@gabeschepers5864]

@@bigbucksbigtrucks1722 no it was straight back from the down pipe

[@davidrubio4791]

What size lift does that Chevy have?

[@stevendavis9485]

Was the white truck was purchased in Winchester, Virginia?

[@nicks1156]

Are those exhaust kits aluminized or stainless steel?

[@RadMachines]

I think stainless steel

[@Luke-ic7lb]

What company’s tunes are on the white truck?

[@t.l.robinson2162]

5". The quicker I get the exhaust out, the quicker I can suck in fresh air.

[@araw1212]

Sounds like the 4 inch sounds better. A lot more whistle

[@twinnfield8998]

where did you find the 5in exhaust for LLY

[@yamahoettr230guy8]

What’s all done to them?

[@codycox5594]

You mention they do not have a muffler. What about a CAT for either?

[@RadMachines]

No cats literally a strait pipe!

[@streetbikebilly2597]

That 4 inch sounds pissah dude when she's revved tho

[@streetbikebilly2597]

0:46 before the turbo spools. That's the best sound, fuck that turbo wine

[@stevendavis9485]

Shit man, NVM. I see the license plates now

[@user-rw1mw7yb3n]

that chevy is a LB7 not a LLY

[@RadMachines]

lol

[@user-rw1mw7yb3n]

@@RadMachines Go do a VIN search and tell me its an LLY.

[@GMCJay_lly]

They both sound like vgt's to me. 8th digit 1=lb7 8th digit 2=lly

[@RadMachines]

The 8th digit was 2.

[@RadMachines]

Guys thanks for watching! If you liked it please hit that like button and subscribe!

[@reaper_6six6]

Veeeedeeeeo 😂

[@jaxsonspalla1372]

Chevys better cause it’s a cateye

[@RadMachines]

I think the gmc looks better. But if the cateye was built properly with a lift and tires I agree it would look better.

[@janamaro5894]

And that GMC Sierra. They're are cateye too.

[@GMCJay_lly]

GMC!

[@streetbikebilly2597]

Too much turbo not enough bark

[@RadMachines]

For the 4 inch exhaust I'm assuming?

[@streetbikebilly2597]

@@RadMachines both I have a 06 LBZ and that hair dryer sound gets old after awhile.

[@RadMachines]

I see. I guess it all depends on what you like

[@adamw.6488]

Kind of the LLY way lol

[@GMCJay_lly]

It's the wooshy stock down pipe. A 3" aftermarket dp is well worth it.