No programmer needed with just a slip on, but quad will benefit from one even w/out the slip on. Repacking is exactly what it sounds like. Taking the exhaust apart and removing old packing and installing new.I want to put a dg O series slip on exhaust on my atv but do I need a programmer. i don't want to start messing with the computer .
???repacking exhaust??? Wath dos repacking exhaust mean