i just got a set of KOOKS headers and a Borla cat-back installed by MTI...it ran great when he test drove it and for about the first 10 min i had it....

but then about 10 minutes after i left my SES light came on..the Y-pipe started banging...and at low rpms and in park my car shakes like hell...

i just got my cylinder misfire fixed before i got my headers and now it seems like it is happeneing again? please help me???

 

Damn...got the miss fire fixed and now this. What code is the car throwing? I would just go from there once you find out what it is - could very well be the o2's. As far as the banging goes it just needs to be adjusted...take it back! tell them whats up.

 

https://ls1tech.com/forums/general-maintenance-repairs/464111-long-tubes-killin-my-o2s.html

Does this sound like your prob? If so, look at my post. It might be why your SES light is on anyway, not sure about the rest.

 

That flippin' SES light is bright too! Gets on my nerves.