Slo5oh

I know lots of companies offer diffrent exhuasts, and claim staggeringly diffrent numbers for gains, but what would a true gain be for a stock 5.0 stock "headders" with a 40series offroad H headder-back (flowmaster obviously). Guesses and actuall knowledge welcome, but let me know if its a guess, or if you have solid dyno numbers.

ltrayne84

this is a guess... but i'm thinkin 10-15 horses

Slo5oh

fly or wheel. im guessing fly?

88BlueGT

Guess: I wouold guess about 15-20 fly for a h pipe and a catback.

7upedition

headers, off road mid, and tuned cat back should yield 15hp to the wheels over stock

ckyguy68

Your car will feel a bit slower off the line with full exhaust, because of the small torque loss. It will pull harder on top end.

7upedition

^+1 low end torque will suffer some but top end will tear along....

grabbem88

i didn't ..and this is with long tubes which people say it's pointless unless you are making 400+hp??...

2 kwik

there is very lil different is no cats or cats in a near stock car......just going to a 2.5" exhaust will help all thur the rpm range..it's good for 15-25 horsepower

Slo5oh

how bout 3"

(thinking eventuall LT's)