wes96z

iTrader: (1)

I have an 00 Z28 M6 only mod is a whisper lid and ngk tr55's in a couple of weeks im putting QTP 1 and 3/4" LT'S and 3" true duals w/bullet mufflers approx what amt of horepower can i expect and if any how much of a drop in my 1/4 mile time on street tires

99silverWS6

iTrader: (3)

Around 25+/- RWHP and maybe .3 drop in E.T.

Gloveperson

iTrader: (9)

I say more than 25 horses. Stock exhaust to full exhaust will true duels? 30-40 with tuning.

What are you running before this, then we can say how much you will drop. It could be as much as .5 or as little as .1

-Todd

wes96z

iTrader: (1)

ive never ran it but from prev experiences at the track, my best guess is about 13.6

Gloveperson

iTrader: (9)

Expect low 13's

-Todd