Anyone ever use a Flowmaster on 6.4?

nvrsatisfied84 · Jan 7, 2015

Basically I got a 08 6.4 f-450 with 4"dp back to duals with a small pass thru muffler and what the mad hair dryer sound to go away. I was thinking maybe a chamber flowmaster could possible change it. Anyone have any experience?

sootie · Jan 7, 2015

an FTE resonator works or an aeroturbine muffler

nvrsatisfied84 · Jan 7, 2015

well I guess flo-pro gives you the fte resonator as a muffler because that's what my muffler looks like exactly

Mike@MPD · Jan 7, 2015

I don't think you can get a flowmaster big enough

fnlyfree · Jan 7, 2015

Mike@MPD said:
I don't think you can get a flowmaster big enough

I had some 5" inlet/outlet outlaw series Flowmasters on one of my drag cars (not diesel). I'm still not sure those will get the results you are looking for.

footlong70 · Jan 7, 2015

Flowmaster has their "pro-series" mufflers which is what use to be known as their "hushpower" line. They are meant for higher hp diesels without the all the noise. At least that's how they advertise them. They are available from 3"in/out to 5"in/out. I bought a 4" a few years ago when I first deleted. Excessive noise and hairdryer sound is very minimal even with stacks right by your head. Yet a very nice, firm, diesel rumble/whistle throughout the rpm range. I like it.

Coposrv · Jan 8, 2015

A few years ago I put a chambered flow master on my mustang to quiet it down a little bit. After a few pulls during tuning I cut it off and picked up 70 rear wheel HP. Turbo cars especially like to breathe. I would stick with something that flows straight through.