Hey guys, so I have a 01 gtp and so far all I've done with the car is install headers, 180 tstat, cai, copper al104s, 1.0 zzp tune and stock pulley. I'm still getting knock at around 70mph at WOT. I've checked the engine bay for loose components that could be giving me false knock and I couldn't find a darn thing. What do you guys suppose I do to get rid of knock? My plans were to run a 3.6" pulley by now, but I see no point in doing so. The ultimate goal was to get to a point where I can run a 3.4" with no knock. So what should be my next move guys? Thanks in advance!!
