Quote Originally Posted by TheTokenAsian View Post
I had similar KR on my car, bone stock except shift kit. ZZP plogs + their 3" dp dropped it down to < 2'. The 180 thermostat didn't really seem to help KR on my car nor did 1 range colder plugs. I'm considering getting their 1.9 rockers today since they're on sale to try to eliminate KR entirely, but not sure if it's worth it.
Did you install the downpipe and plogs at the same time? If not, did one help more than the other? I'm wondering if the front plog or downpipe would help more since 04+ cars don't have the downpipe u-bend and therefore might not be as restrictive.