I'm sticking with the stock turbo and looking to get the B.R. 2.5 downpipe. It says that it bolts to the stock cat, but that's about to get the boot too. I know from past experiences if a downpipe "bolts to the stock cat" it will neck down, or reduce in diameter, to fit to the stock cat. Is this the case with B.R. too, or does it retain the 2.5 diameter at the outlet too?

 

Hey Larry

I have that downpipe and it is the same diameter all the way through. If you can wait a week or two i will be selling my 2.5 thermal caoted B.R. DP . It has been on the car for about 4500 miles. I am going to a full 3" and in the near future may be going to a bigger turbo. PM me if you are interested. I will be letting it go for a good price.