What can I expect???

[JakeDaSnake]

Ok I have a friend that said he would sell me some Mac LongTube headers and a Custom off-road H-pipe for real cheap (around 100 bucks) anyway I was thinkin on gettin those with 2 flowmaster race mufflers and turndowns before the rearend... what kinda power gains do you think I'd see? my exhuast now is stock manifolds stock H-pipe with 2 cat's and Dyanmax Bullit mufflers.

 

[IJUSTWON]

Your not gonna have enough backpressure therefor wont get as much out of it as you could with some different mufflers, go with 2 or 3 chamber and youll see better numbers.........

 

[JakeDaSnake]

40 Series?

 

[JakeDaSnake]

What about 40 Series flowmasters??? will those work good? or is there another brand I should look at...

I couldn't care less about emissions cause they dont check it down here...

Later
Jake

 

[rays1999cobra]

I'd guess around 15-20rwph/tq

 

[Andrew_5.0]

if its a 99+, i've seen gains as high as 30hp to the wheels from headers, o/r midpipe, and catback, and a k&n. My buddy has a dyno shop. Lot of 4.6 99+ with the same results.

 

[Wayne S]

Your not gonna have enough backpressure therefor wont get as much out of it as you could with some different mufflers, go with 2 or 3 chamber and youll see better numbers.........

I still have my stock mufflers

What you should do after you get them is Save for an X-PIPE somthing like a drgas would be my choice.