I did search and i didn't get a clear answer, and since gruppe-s carries these downpipes, I thought i could get a reliable answer here. I'm currently running an HKS carbon Ti, stock downpipe, and stock cat. If i buy the helix version 2 downpipe would it bolt on to the stock cat with no problems? Thanks.

 

Yes it should fit

 

Thanks for the reply but does Cal or Tom wanan chip in on this question? and what highflow cats can i run with a helix downpipe and hks carbon ti exhaust?

 

Might want to wait till business hours