whats up everyone? so i just installed my testpipes today...i got the megan resonating ones...sounds a lot better. Only mods i have are plenum spacer and cai with stock exhaust. The stock exhaust sounds a lot meaner now...but i'm not sure if it was the weather cas it was like 75 degrees or what but the car felt like it lost a bit of power possibly low end...anyone else experience the same? this normal? do i have to reset ecu or not necessary? Also no CEL came on yet and i have an 04 coupe....if anyone has similar mods and dyno'd feel free to share how much hp you made

-Desh

 

Might try a reset to help the ECU but the lack of back pressure may cause some low end loss.