OK, I've had my truck for about a month. I'm looking to mod the exhaust. I need some expertise for best recommendations for performance mods to my '05 Supercrew FX4 5.4L. All tips appreciated.

 

the magnaflow is a good system but it is expensive if you dont want to spend the $ the flowmaster is good also, cant go wrong with ether one both are good in my book

 

Another good idea would be a chip.

Visit Mike Troyer's site, http://www.troyerperformance.com or you can call him and talk to him in person.

 

here is some good info on mufflers that i have went by for years and it has worked great for me and others.
All tests via an independent lab
All tests @ 15” wc

2 “ Straight Pipe 283 CFM
2 ¼ “ Straight Pipe 365 CFM
2 ½ “ Straight Pipe 521 CFM

2 ¼” Typical Bent tailpipe 268 CFM
2 ½” Typical Bent Tailpipe 417 CFM

2 ¼” Inlet/Outlet_ Glass Pack Tips- No Louvers- Smooth 274 CFM
2 ¼” Inlet/Outlet- Glass Pack Tips-Louvered 133 CFM
Same as above set for reverse flow 141 CFM
2 ¼” Cherry Bomb 239 CFM
2 ½” Cherry Bomb 294 CFM

2 ½” Inlet/Outlet Dynomax Super Turbo 278 CFM
2 ½” Inlet/Outlet Ultraflow Bullet 512 CFM
2 ½” Inlet/Outlet Gibson Superflow 267 CFM
2 ½” Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM
2 ½” Inlet Outlet Flowmaster ( 3 Chamber) 229 CFM
2 ¼” Inlet/Outlet Thrush CVX 260 CFM
2 ½” Inlet/Outlet Maremount Cherry Bomb 298 CFM
2 ½” Inlet/Outlet Hooker Aero Chamber 324 CFM
2 ½” Inlet/Outlet Hooker Max Flow 521 CFM
2 ½” Inlet/Outlet Borla Turbo 373 CFM
2 1/2" Inlet/Outlet Magnaflow 284 CFM

Standard OEM 2 ¼” Inlet/Outlet 138-152 CFM
Standard OEM 2 ½” Inlet/Outlet 161-197 CFM

 

Hi.

So your data indicates that a Hooker Max FLow is an expensive piece of straight pipe ;-)).

Interesting info... what length of pipes ( and mufflers ) were tested?

I think that flow rate is also determined/affected by pipe length and bend radius as well.

Cheers!

 

wow 35CFM different between flowmasters and magnaflow... so with that in mind is magnaflow really better???? lol like is it worth the extra 100 bucks for 35CFM which is little difference for exhaust flow

the 4.6L @ 5500RPM is exhailing 446.7CFM
the 5.4L @ 5500RPM is exhailing 512.4CFM

 

Some care more about the sound produced than the CFM...so 34 cfm may be worth $100 if you don't care for the Flowmaster sound.

 

34 CFM is the equivelant of 104 RPM.... on a 4.6L

28.3=1cubic foot 34 CFx 28.3 = 962.2L\4.6L = 209.17 and since the engine displaces itself every 2 engine rpm then we do 209.17/2