P430 has emerged on a permanent basis in 6th gear on highway. HO2's are fine.

I'm guessing another stocker or aftermarket Random Tech stainless steel with cats to keep it emissions legal.

Anyone with similar set-up? Watcha using?

TIA

 

The only aftermarket y-pipe I know of for our cars is made by Random Technology, they make a version with or without cats.

 

IMO its not worth the cash for a random tech y pipe. A stock replacement would be more sensible......especially for little or no power gains.