and now have a slight shake at idle after a few seconds. Other than that runs fine . I was blowing a PO430 before I installed spacer. No codes yet but have only done 30 miles.

 

needs to be tuned for it

downstreams are not to be messed with they are not just cat checkers

 

Runs fine maybe feels even a little quicker when I get into it now just that annoying vibration ( miss?) while at idle but only after it sits for like 10 seconds or so at a street light. If it doesn't stop I will take spacer out.