if i cant get my hands on a stock cat, what should i do? my car is bone stock just customer exhaust and no cat. please help. thanks!

 

If it's all stock like you say then putting the cat back in should be good. Also if your downpipe is aftermarket most places will want that changed back to stock as well. Other things they will look at are the intercooler pipes, blow off valve and vacuum lines(boost gauges and boost controllers).

 

most smog shops don't look to deep when it looks factory from the top. I passed smog with a 3" xs engineering dp and forge unos mbc. just have to get creative and hide the mbc. I hid mine under the radiator.

 

U need a cat.

 

Check this out:

https://www.evolutionm.net/forums/we...ad-merged.html