1ATony

The MAC Pro chamber rocks.Most H-Pipes are about a 12hp gain the Pro Chamber is about 23.I run it on my 92

92hatchLX

+1 on the prochamber

ALMOST STOCK

X
MagnaFlow X to be exact!

gyunior50

This is what I read in a old musle mustang and fast ford magazine.
H pipe are realy good for torque and bottom end vs the x pipe is better for horse power wich is better for top end. But I really think is the tie breaker is what exhaust tone are you looking for, Raspy or Deep / throghty.

FoxGT

horse power & torque are related. Horsepower is just including the engine rpm so it factors in that at higher rpm you're burning more air/fuel. That's why diesels typically will have a very high torque # vs hp #. & why 4 cylinders typically have more hp than torque, they're designed with higher rpm being the efficiency point. A better way to describe it would be the H offers more low end hp, the X more high end hp.

OnyxCobra

there's no way you could feel the difference in power between an X and an H pipe, or even a Prochamber for that matter.