1970 Mach 1 Mustang with Flowmaster 40 Series Delta Flow Muffler

[@FlowmasterInc]

Your Mustang sounds awesome! Thanks for posting the clip, we'll be adding it to the "Customer Rides" section on our KZbin channel. - Jason @ Flowmaster

[@rona.4063]

Cool and thank you! I was hoping that I would be able to provide a good sound comparison for those who are comtemplating in installing this type of Flowmaster on their mustang or on any other muscle car.

[@FlowmasterInc]

Good looking out! Glad to hear that your happy with the new muffler! - Jason @ Flowmaster

[@rona.4063]

Flowmaster Inc I will be showing this car at a car show this weekend and cant wait for people to take notice of the flowmaster rumble. Will be so nice!

[@autoshotty]

Back in the day when we had only three choices. ( Glasspacks, turbo or straight pipes) I fitted my 70 mach 1, M code Cleveland with medium duty stainless diesel mufflers. To this day she has the most unique sound and would never change it. Mellow at cruise then sounds like a flat plane cranked V-8 above 4500 rpm's.

[@chuck_machine]

Sounds interesting. Would love to hear it.

[@RidinDirtyRollinBurnouts]

I know what you mean. I've heard a cleveland v8 screaming and at higher rpm stops sounding like a pushrod v8. Such a crisp sound.

[@reymas7749]

Old sounded good too!

[@MarkRoberts-bj2me]

Car sounds great with the 40’s but need a Mach 1 properly equipped with a CJ and 40’s.

[@robertclymer6948]

Second video I have viewed with the Flowmaster 40 series Delta Flows. Mind is now made up, off with the Magnaflows, on with the Flowmaster 40 series Delta Flows. Thanks for sharing. They should sound awesome with my well built 460 big block 67 Mustang Gt. Cheers from Motown.

[@bawr4509]

Love flowmasters sound! Their mufflers are like tigers growling compared to a dynomax which sounds like a pig grunting

[@sokodad]

Don’t necessarily agree. Depends on the vehicle. I’ve used them all. Currently have three vehicles with three different types of mufflers and like them all.

[@jerryrivera7704]

Ur absolutely right about that we are the king's of the jungle

[@oscarsinoca9394]

Very Beautiful machine!! Congratulations and great Flowmaster system with a great sound.

[@rona.4063]

Thanks Oscar! I appreciate your positive and uplifting comment!

[@oscarsinoca9394]

@@rona.4063 You welcome. I ve a 1979 Chevy Malibú with the same dual Flowmaster 40 series delta but I love great classic Mustangs. Flowmaster 40 delta is a great choice because you have great sound outside but with moderate sound inside. Enjoy this great Mustang Ron!!!

[@mjbachman3027]

My 1970 Mustang Mach 1 with a 351 Cleveland with the big 4v heads, full length Crager hot pipe headers and Thrush mufflers, and sounded wicked to the bone.

[@robertclymer6948]

Hey Michael, what Thrush mufflers did you go with? I was considering them too. Thanks!

[@mjbachman3027]

@@robertclymer6948 I don't remember. It was 1974. The following year I added exhaust pipes aft of the Thrush mufflers and the stock chrome exhaust tips, as it was excessively loud without them for the street and the university parking structures .I also had new door shins installed, and had the whole car repainted. I didn't put back the plastic honeycomb panel between the taillights though. Instead I had the paint shop paint it black like a Boss 302. I had them install new Mach 1 numerals on the deck lid. It was painted medium metallic blue. I would love to get another 1970 Mach 1.

[@Chrislav7]

Damn the flows sound way better!

[@rona.4063]

Thank you for commenting...much appreciated! I'm glad to know that you think the Flowmasters sounds much better. I do agree.

[@CJ-ib2jy]

Sounds like my old Mach 1 that sported a 351C-4V. I own a '70 428 CJ Mach 1 with Flowmasters and despite the difference displacements, it too sounds a lot like this one - just a little lower pitch. I love the Flowmasters - not too loud even wit headers but still a LOT of power.

[@rona.4063]

So lucky. . . POWER you do have! I'm glad that my 351C-4V sounds similar to your 428 CJ which just means both our Flowmaster muffler systems are spot on. I wished though I had a 428CJ underneath the hood!!!

[@428CJ70]

@@rona.4063 You can bore and stroke that 351C-4V to 408 CID. Not only will that extra stroke and displacement seriously help your torque and horsepower, it will also better consume those huge valves and ports you have which will increase low RPM torque even further. Add a lively retrofit hydraulic roller cam, a 750+ cfm carb and headers if you don't already have them. Finally, I don't remember your transmission but if its an auto, then you could go to a 2400 RPM stall speed converter and the cam will cause the motor to rev so quickly in normal driving you won't notice the stall until you stomp it. Then you'd better have a traction lock rear end or a Detroit Locker. I pulled my C6 and installed a beefed up 4R70W transmission retrofitted with a big block bell housing so I could get overdrive to go with my 3.91 gears. Those gears are awful on the interstate w/o overdrive. It's pretty easy to get a 408 CID Cleveland to 500HP and still be civilized enough to drive in on the street. I bored and stroked my 428 to 469 CID. If you do stroke your motor, be sure to use a forged steel crank and forged steel H beam rods. I oped to get the high grade version because I don't want to risk my original engine. If I still had my first car - '71 Mach 1 351C-4V, I would do the things I suggested. As it is, I did all that to my 428CJ except I got a solid roller because, at the time, no one was selling a hydraulic roller retro kit for the CJ.

[@rona.4063]

Wow. Looks like you've done a lot with your Mach1 already. That's more than I could ever imagine on trying to get my pony to run much faster. For a while, my Mach1 just stayed in my garage for 6 years until recently, I started working on it, getting it back to running condition. Thank you for your great advice and insight. Your suggestions are definitely noteworthy not just for me but for those considering to improve the performance of their Mach1s (if it hasn't already been worked on). I do want to share that I have taken out Ford's factory power steering unit and converted it to an electric power steering which in my opinion, the handling became so much better. I'm also not having to worry about the notorious fluid leaks LOL.

[@428CJ70]

@@rona.4063 I kept my original power steering unit. A lot of people swap it out with the power steering unit from the '71-'73 Mach 1's. That unit supposedly handles much better. This biggest complaint about the original unit is that it provides too much assist and you don't feel the road as much. The pulley for the 428 is a different size and uses less power from the engine - and privies less assist. It's ironic because the 428 is nearly 100 pounds heavier in stock configuration. But driving a modern car and then driving my Mach, I really don't notice that much difference. My front end was fully restored and my mechanic tinkered with the PS a lot to get it to drive the way it does. I really don't know the details of what he did. The steering in my brother's old '69 Mach was much more mushy and had very little feedback from the road. I don't know if it was just wore out or if it was because it used the standard size PS pulley. But yeah, I've done a lot to my Mach. Because of its displacement (469 CID) it idles pretty well at 800 RPMs despite the solid roller cam and bigger valves. And its crazy fast. If I listed everything I have done to it, it would be a very long post. Except for the headers, it looks stock and its idle sounds close to stock. But even with an automatic transmission, it can spin its Firestone 295-50-15 radials at any speed, in any gear - except overdrive. I have the transmission controller set to automatically disable overdrive whenever the throttle is 50% or more. I have never used nitrous oxide. It would have been far cheaper but from my hot rod days in the 70's and 80's. I can't get the old saying out of my head, "bottles are for babies". Today, most hot rods use superchargers. At least then, the power is always there.

[@rona.4063]

I can see it now...you racing some person in a newer car who unknowingly doesn't know the souped-up engine you have under your Mach hood LOL. Cool!

[@robertmassey9953]

Definitely sounds better after the upgrade

[@hotrodray9884]

Heard a Windsor car that uses @2015 5.7 Charger resonators as mufflers. Pretty nice, and not excessively loud.

[@dougcoleburn1579]

Just had mine done today on my 69 with the H pipe and 40s. My lord is it loud. Video does no justice to the actual sound😀 It’s fun though! Thanks for the video!

[@rona.4063]

That's Awesome - Congrats...I'm glad to have provided you some insight. I appreciate your comment and enjoy it!

[@vd4826]

I have a 69 with a H pipe, thinking about trying it. Thanks for the update :).

[@bobjohnson7972]

Man that sounds a lot better

[@tonichecavalari5956]

New exhaust sounds fresh 😎👍

[@StormLaker]

Definitely loving the after. Gotta let those ponies loose!

[@Cruzcity]

Convinced me. Copy & pasted title to purchase thanks!

[@gamersbarbershop]

dream car 🤤

[@Wooley689]

Both sounded good, but the flows did give it a freer flowing sound

[@lewisfrazier3506]

Love Flowmaster

[@googlenutzer7332]

Very nice Sound

[@218422100]

I think I found my new mufflers 💯😎

[@MikeSmith-pq4wz]

Nothing sounds better than a Ford V8 with a set of FlowMAsters!

[@rona.4063]

Absolutely! I should have changed the mufflers long ago.Thanks for watching!

[@rona.4063]

Lol. Fords and GMs are definitely true classics. Great to have them.

[@dominicsosa7405]

dynomax!!

[@rona.4063]

Thanks! I like it. Something to consider!

[@hotrodray9884]

Thats why they make many different mufflers/sounds. Most people HATE Flowmasters.

[@tjstevens001]

Sure sounds great!

[@rona.4063]

I appreciate it! Thanks for watching.

[@nipafilms236]

Nice sounds!

[@rona.4063]

Thanks for the compliment!

[@wolfthornhawkridge5705]

That sounds sweet!

[@ikennaihegbu7692]

That's a sexy ass car... with the right sound

[@gwolf6975]

Both cool, flows have a bit of a lower deeper throatyer growl

[@redrider1079]

Was there any special reason you extended the tips 1 3/4 inches? I have a '67 Fastback with a 351C and Flowmasters, love the sound.

[@rona.4063]

Hi. I decided to extend them a little since they would have be hidden, tucked underneath the bumper and less to be admired. Considering that I paid $250 for the pair, I also wanted to accentuate the good looking form of the tips.

[@redrider1079]

@@rona.4063 Ha ha, I don't blame you, they are great looking and I think I might get them for my car as well. Thanks for the reply.

[@mirekadamek]

Hi,hope you reply to me,also have Mustang 68 and 351C,but there are installed headers Hooker 6920 and they lay quet low.what/which brand and item no. you have on your 67´? thx for you reply Mirek

[@michaelpashan21]

Sickkk so these are flowmaster 40's? correct?

[@donalderdbrink647]

I actually own the same mustang! Color,year,but mine has a 351 Windsor!!👍 Subscribed

[@rona.4063]

Great coincidence! Hey it's all good and each Mach1 is unique in it's own way. A long story for my Mach1 and how it all came to be. More details later on my upcoming video. Thanks for watching!

[@600lwp]

I'll give you 2000 for it if there is no rust...................OK just kidding In 1980 I passed on one the same color for 700.00 because it had a 428SCJ and I'd kill myself in it

[@robertstewart3086]

Sorry Ron I just read your comments with 428CJ70, apparently your Cleveland is a 4V motor with 4v heads? Most 4V Clevelands came with the much beefier C6 trans. Also the next time you change spark plugs you WILL be happy that you DON'T have a 428 in your car! Let me know if you have any Cleveland questions, I have a Boss 351 Cleveland in my 69 Mach 1 .

[@rona.4063]

Hi Robert. I have a 4V V8 engine with a C6 trans. My Mach1 is an "M" code. I already have a hard time changing spark plugs as it is since it's truly cramped in some places and I could only imagine what it's like with a 428. Thanks for commenting and it's awesome you have '69!

[@jerryrivera7704]

What a beauty she is

[@ineverhadthemoney7857]

my first new car 1970 grabber green Mach 1

[@josetrinidadfuentes2287]

Wht are the tire and rim size you have on the mustang?

[@rona.4063]

P225 65R/15

[@thomascarter4968]

She sounds good!!

[@rona.4063]

Thanks bro. I really appreciate the comment. I hope to make another video soon on just the mustang itself.

[@hotrodray9884]

We build custom mandrel exhaust. We have a FlowMaster pile out back. People run them 3,000 miles and literally throw them away. They hate the raspy sound and the droning. They go to Dynamax "Super Turbos", Magnaflow, or sometimes glasspacks. We have pulled them off all types of cars. We have also done back to back tests on Mopar 440 with Magnaflow and instantly lost 60 hp on the chassis dyno with 40s.

[@jamiehope4580]

Loss of 60hp just from mufflers this I would love to see in video definitely. That sounds way too much

[@williamjver]

Is this car for sale?

[@andyoutlaww7494]

3:31 4:02 4:29 sweet sweet Flowmaster Music!

[@rona.4063]

Cool - Nice and thanks for highlighting!

[@robertstewart3086]

Cleveland's really like to breath. A high quality set of headers should be considered .. The non C6 trans tells me this might be an H code 2V motor ? Hope that's been upgraded by now to a 4 barrel carb and intake. That will REALLY wake it up !

[@chipcurrey653]

My original M code 351 C also has the fmx. I believe all 351c in 70 had the fmx, or at least I have never seen a factory car with a c6. With a Google search I cannot find otherwise.

[@StreetTruckinTitan]

@@chipcurrey653 We had a 70 Mach 351C and it also had a FMX.

[@earnieb5318]

351c with FMX was the go to from Ford, in the day. Many, many Marti reports show that.

[@joelow4517]

SOUNDS BETTER BEFORE YOU CHANGED THE MUFFLERS ,MORE OF A THROATY SOUND RATHER THAN A NOTHING SOUND ?

[@rona.4063]

I truly appreciate everyones comments. I'm just amaze by your observations which I truly can comprehend and in some ways has me contemplating whether I made the right decision. I personally picked the flowmaster because of having been influenced by various you tube videos showcasing the same type of muffler. I decided to make my own video to return the favor and perhaps help others decide. So, I truly want to be honest here. I pretty much prefer the throaty sound but is it enough for me; I think not. I'm beginning to think of whether I should have gone with the next louder flowmaster. I'm thinking of upgrading but for now, I'll just wait a little bit longer and who knows, I might just change my mind once again.

[@RA-nq1xs]

Your hearing aid must be off, sounds much better after.

[@davebrown5403]

Is this a 2" or 2.5" inlet/ outlet?

[@rona.4063]

Hi Dave - the mustang was fitted with a muffler that had a 2.25" inlet/outlet.

[@josephridley4556]

Get rid of music

[@biggdogg19]

Sup wit all the blue smoke at start up?

[@hotrodray9884]

Hes bragging. If he cared, he should have restarted it with no smoke. lol.

[@rona.4063]

@@hotrodray9884 Lol. You got that right! Got to have some smoke to add to the affect otherwise it'll be dull.

[@jamiehope4580]

It's just valve seats or guides can't remember correctly but its leaking abit of oil in cylinders which is better for dry start ups. Lubes up alittle and prevents metal on metal rub.

[@keithmcleod811]

It's a nice old classic, a little smoke at startup is not a big deal.

[@johnandersonjjr]

It didn’t sound as bad as I thought it would (with the FM44s)But I recall that year mustang and the 71s sounded great with the factory deals.I was exp it to sound too loud and glass packy like the idiots in the new mustangs who must be setting them to track mode and are seemingly determined to have democrats bring in stricter noise regulations.

[@jerryclasby9628]

Go flowmasters

[@ericmartin6457]

Your neighbors aren't going to be happy.. What's wrong with super quiet, you'll be able to hear the rockets. The carb jets. All The bearings...

[@rona.4063]

Eric can't help it LOL. It's like training a lion to growl like a pussycat. . . just doesn't seem right. Like an orchestra, the pings and the bearing sounds also contributes to the growl. Even now an electric car is required to makes sounds because they are too quiet and people get run over.

[@vmoya6631]

It should be a state law. No desirable classic muscle car can have trashy mufflers on it.

[@rona.4063]

😁Ha ha. Totally agree!

[@dat_ford_guy2051]

Before sounded much more mean and better in my opinion

[@rona.4063]

Apperciate your opinion!

[@budsodalsky]

hold the camera still dude

[@louiea5656]

Sounds weak

[@rona.4063]

Thanks for commenting! I truly respect your response and thats exactly what this video is all about. This type of muffler may not be for you and I hoped in someways, I contributed to your perception about this type of flowmaster or validated what you've already perceived to be true.

[@Hidden-comment164]

alouie alouie it’s a mustang what did you expect

[@bveezy5246]

@@rona.4063 awesome response man!

[@IntelligentHorseworldofrandom]

alouie alouie why?

[@mac4boys541]

@@IntelligentHorseworldofrandom Because his mommys honda civic sounds way sicker!!!!

[@kskip4242]

Should have left it stock if you weren't going to put some decent Mufflers on it Flowmaster sound like s***

[@JB-zn1kx]

Fix that bumper

[@rona.4063]

Nothing wrong with it...its brand new and that's how they are mounted originally but I do wish the bumper fits more snuggly.

[@josephcosta5161]

Seriously old was BETTER

[@spirithunter9305]

44 is better

[@rona.4063]

Might just consider that!

[@dominicsosa7405]

i hate flowmaster

[@rona.4063]

Thanks for watchig! It's truly a matter of preference, since there are many brands and types of mufflers out there, and various factors to consider which includes sound, affordability, quality, availability, and so forth.