timi

so my friend got a new mac catless h-pipe a couple of days ago. he went from catted mac to catless mac. now he says he's lost a little power. why is this?

his mods are: mac cold air, bbk t/b, pleneum, flows, diablo tuner

thanks!

I G Joe

he lost low end torque for high end power. there is less back pressure in the low end for the exhaust but its more free flowing for the top end. i can almost garuntee it should pull a little longer in the top end. also, tell him to get a lightweight flywheel from Fidanza and a Lightweight Driveshaft from FRPP. those will make up for the low end loss.