will I pass the smog test in CA with a y-pipe, cat, and b-pipe from warpspeed? or do i have to let it warm up?



in either case, should i just leave the factory cat in place because the high flow ones won't pass? then I would pass every time regardless of the y pipe?.....!

 

you MUST heat up the cat if you have Ypipe

 

Drive for like 30 minutes and when you get there do NOT turn off your car. Just let it idle the whole time (it says this on the IL emission test date paper they mailed to me).

 

ALWAYS make sure the engine is completely warmed up before an emission test.