itll throw codes but only for the rear o2s cuz they wont be hooked up but they will get cut off in the tune anyways it shouldnt hurt anything lots of people have driven around with headers and no tune itll run rough and rich but wont hurt nothing just make sure you get the front o2s hooked back up
2006 Chevy ECSB 5.3 - New L33 Motor,CAI, Descreened MAF, Nelson 93 tune, Transgo Shift Kit, servos, 3in exhaust, Borla, pacetter LT's, and ORY, Aeroforce Furture: stall, cam, 4.10's
ya, it'll be alright. like they said, some codes, but no biggy.
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5.3 2wd upgrades: Nelson tune, stainless lt's, magnaflow, e-fans, msd's, cai.
I like your style.Originally Posted by sloCaddy
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