Just an FYI to anyone buying a tune from Livernois and running cat-less. Just because you have no CEL doesn't mean you're going to pass the OBDII emissions test, you will not. Livernois shuts those monitors off. The same luxuries offered through tunes via SCT software and HPTuners do not apply here. Personally, I find the Livernois adverting misleading. We've been hearing about Off Road use for years on catless pipes. And most are accustomed to getting around that in their aftermarket tune. But, infact, the Livernois tune is for off-road use only too. Good luck finding that on their website, or have them warn you before letting you drop thousands on parts and that mini programmer. If you live in any of the 33 states doing OBDII emissions testing, keep this in mind.