The new LLY has a cat on them and only cat-back systems are being made for them. I know some people are taking the cat off and putting a 3.5'' downpipe on them to increase power. The problem is that they are all throwing back pressure codes. Is there any back pressure code eliminators out there to solve this problem?

Look in this forum for a "finger stick" it will elininate the EGR, low boost and backpressure codes. It worked on my truck 05 LLY with cat back exhaust. Good luck, you can also look up a man named fingers, he sells them.

they don't just sell cat back.. you can get a full exhaust from front pipe to tip for any LLY. the stock pipe is 3.5" and all the aftermarket ones start at 4".

check out the Power and Performance section for answers to all your questions.

i threw my cat in the trash along with the muffler and have had no problems. is it because i live in Iowa and the emissions are different? there were no sensors on my stock exhaust.