Quote:
Originally Posted by Checkmate1
Any one try Kooks LT Headers + Greencats paired to Stock NPP exhaust?
I hear it does not require a tune and no CEL.
Thoughts?
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It needs a tune. If you don't tune it, you'll see no gain. You will get a Check engine light, I do not know how they're saying you won't unless they're just going to disable it. The ECU will eventually adjust to the change and close the throttle accordingly to maintain the stock torque parameters and you won't notice a thing except it will be louder. LT Headers with or without cats completely removes all factory catalytic converters and the o2 sensors which are now either vacant (no cats) or plugged into a high performance cat will know. Plus, you have a chance of knock and your engine may run worse due to lean or rich conditions.