Rep Power: 242

ok guys i finally have my k20 swap complete...the motor is in and it pulls like a beast...no i have some edge header and downpipe with a custom 2.5 exhaust that i used with my d17 setup on it....now im gettin alot of vibration, like its shakes the hell out of my radar detector in my mirror.. any suggestions what it might be.also my exhaust is super loud...whats a good exhaust i can get to quite it a lil

 
Rep Power: 305

if you swap out a motor, they're going to replace your stock motormounts with performance ones, so, that means there will naturally be more vibration because the mounts are probably made out of polyurathane instead of rubber.

 
Rep Power: 278

I've heard a k20 swap makes the car vibrate a lot at idle something to do with the mounts as stated above.

 
Rep Power: 297

my car idles like stock... dont know what everyone else is saying.. the only vibration i get is when clutch is engaging in first gear.. thats it