How long did it take you to notice the full horsepower gain from the y pipe?
Did you reset the ECU?

 

As soon as I turned out of the exhaust install place and hit it..

I can't speak for your car since it's a 5th gen, and I drive a 5.5th gen, but I felt the gain on the top end mainly, and moreso after 4K rpm.

The sound is a bit muted with oem exhaust which is what I was looking for, but by replacing the bpipe you can get even more gains. I'm looking to do this next to complement the intake and ypipe.

 

As soon as I mashed on the gas pedal after install. The engine is much smoother through the RPM range. I'd recommend a B-pipe in addition to the y-pipe... my .02

 

after install i reset the ECU and could notice good gain but noticed even more gain about 3 days later...
so i guess 3 days to see full gains
i dynoed my car and got 240lbs/ft torque weird huh?

 

That is corrected right? You werent puting 240lb/ft down to the wheels?

 

i dont really know since it was my first time dyno..

all i know is that the sheet showed 240lb/ft...

i dont know whether to believe the sheet or my *****