Does anyone else have this problem, from factory my exhaust has always left a black coating on the back bumper, I installed a Esplier cat-back with a Perrin Cat-delete and the problem has gotten worse. I know runs rich from the factory but I am having to clean my bumper every other day. I also have a bushur racing intake.

 

That's a common problem. I had it with the stock exhaust, and then I installed the Espilir, and it's the same. I added and SAFC to tune my A/F ratios, and it has gotten a lot better. Without some type of A/F controller, there isn't much you can do about it besides getting one of the carbon fiber or aluminum bumper covers that go around the exhaust.

 

I have no problem, but I still have the stock cat in. I also have over-the-mail dynoflash.

 

I just ordered one of these from Lancershop.

 

Thanks I have an Apexi A/F controller I just have not installed it yet, I will also order on of the Carbon-fiber exhaust covers...what settings should I use for the Apexi SAFC II?

 

I was going to say the same thing. Great product