1991 Mustang Flowmaster vs Spintech

A back to back sound clip compilation comparing the difference between dual Flowmaster 44 series mufflers with turn downs at the rear axle and dual Spintech 9000 Pro Street mufflers with turn downs in the same location. All comparisons are using the same header and x pipe combination with BBK long tubes and a BBK x pipe. Engine set-up is a 306 SBF, E303 cam, Trick-Flow Twisted Wedge heads with an Edelbrock upper and lower manifold, Vortech supercharger on 9lbs. For those looking to make a change in sound I hope this video was helpful, but the clips of the Spintech mufflers do it no justice-they are extremely aggressive, loud, and create a deep drone at low RPM under load. I’m sure tailpipes would help, but if loud is what you want, that is what you’ll get.

[@NXT_LVL]

Flowmaster give it that metallic popcorn sound "The Flowmaster sound". But the Spintech's give it that deeper bassline note added onto the popcorn.

[@BanditsTA]

Those Spintech's sound sweet!👍

[@Cees_World]

i can hear that blower whistling in the back 😮‍💨🔥

[@blackrat1228]

This is how you do an exhaust video. Great title card too

[@briangodfrey8909]

Extremely helpful gunna run the spintech 9000s on my 440 roadrunner

[@RobRacin]

That’s it I’m placing my order for Spintech 9000’s 😂

[@frankensteincreations4740]

6000’s sound much better imo. Less raspy and trashy more clean sounding. Great comparison video my dude! 👍🏻🤘🏻

[@drpurple9931]

@@frankensteincreations4740 I agree, with this set up 6k vs 9k, 6000s sound better.

[@KINGRG1]

Hard choice for me because I love both 😅

[@davidkeeton6716]

I'm glad you just saved me $300 on the Spintech mufflers. The 2 chamber Jegs Flowmasters are too loud for what I wanted on this car, and I had been thinking about Spintech. Nope, going with Dynomax super turbo.

[@86foxbod]

I had the super turbos on mine. Changed them out for the super 44s.
The turbos had no build up on acceleration. It sounded pretty dull compared to the 44s

[@drpurple9931]

I think the 9000s are great for the “Loud means fast” mentality, but if you’re not into going moderately deaf, the 6000s sound much better.

[@86foxbod]

@drpurple9931 I went out for the 1st drive with the 9000s. It's way louder than I anticipated it to be. It sounds great from 1000-2500. But after that, it screams

[@86foxbod]

Like not ideal for a daily driver car. I'll end up changing then eventually. Not sure what to go with. I enjoy how much "louder" the cam sounds. But it's like as loud as the coyotes now.

[@drpurple9931]

Oh I agree, I love loud but as a daily driver I think it would get old pretty fast. You can hear a definite change in tone at the 2300-2500rpm range during casual driving. At least the cold start sounds better than the coyote lol.

[@linoacuna4283]

am switing my supervisor 44s to spin tech really soon

[@Tornangel866]

Yee yee good buddy

[@brandonmaahs2893]

Hows the drone at cruising speed my fox is annoyingly bad at 65-75 with flowmasters

[@drpurple9931]

Not terrible in comparison to the 44s. I’m sure the axle dumps have a lot to do with that. Having tailpipes definitely makes it better, but I prefer the dumps even with added drone.

[@brandonmaahs2893]

​@@drpurple9931 Nice thanks

[@user-hn2or3ob8w]

Spintech

[@kskip4242]

Both of them sound terrible without tail pipes.

[@JR-ho5qm]

I agree tailpipes always clean up the sound for me. It just sounds better with tailpipes. This car still sounds neat though