how to pass emission with no cat ??

[neonracer01]

@01GPGT

http://www.3800performance.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=O2-EMU&Category_Code=EB&Product_Count=14

might wanna email them, i haven’t bought from these guys in several years. none of the common vendors show O2 sims anymore

i sent them an email and they still have them …
i was reading the artice on how to build my own and it says that it can cause a lean or rich condition, will this one from 3800performance do the same ?