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KingLT1 · 09-18-2017, 02:43 PM

Long story short, I was going to do secondary cat delete, but after checking with several shops and custom exhaust builders, nobody will do the job around here. I know sounds dumb...I agree. Lots of folks have had this done, not sure what the deal is. I could probably keep making calls until I found a place but I am over it.

Anyway, After reading up a bit, it appears the primary cats are the biggest restriction and the secondary do not really do much. So I decided to buy the Bullet performance bolt-in delete pipes and I will use the rear o2 adapters from Big Daddies garage that pull the rear o2's away from the exhaust stream which keeps the PCM from throwing a cell. So I should not need to hook up my HP tuners and void the warranty by turning the codes off.

Anybody else done this?

09-18-2017, 02:43 PM	#1
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,559	Bullet performance cat delete pipes. Long story short, I was going to do secondary cat delete, but after checking with several shops and custom exhaust builders, nobody will do the job around here. I know sounds dumb...I agree. Lots of folks have had this done, not sure what the deal is. I could probably keep making calls until I found a place but I am over it. Anyway, After reading up a bit, it appears the primary cats are the biggest restriction and the secondary do not really do much. So I decided to buy the Bullet performance bolt-in delete pipes and I will use the rear o2 adapters from Big Daddies garage that pull the rear o2's away from the exhaust stream which keeps the PCM from throwing a cell. So I should not need to hook up my HP tuners and void the warranty by turning the codes off. Anybody else done this? __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel Last edited by KingLT1; 09-18-2017 at 09:09 PM.