A few days ago I got my 05 back from getting AR LT's and x-pipe, and bassani street axle back. I love the sound and power, but in gear from about 3k rpm till redline (WOT, very noticeable in 2nd gear) there is more of a tinny, knocking sound that isn't present when revved up in neutral. It may just be the sound of the headers that I am not used to, and I just wanted to ask on here before I took it back to evo to ask. Any suggestions? Thanks.

 

Was it retuned for the exhaust?

 

Saprk knock i'm assuming is what your describing--run higher octane fuel and it should go away. It should deffinetely be tuned.

 

yeah it was dyno tuned by fred at evolution, that's why I can't imagine it's knocking. He tuned it for 93 octane a few months ago when we got theCAI and we've been running 93 ever since. Should I just give him a call?

 

But was it retuned after the exhaust was installed?