I did the same header still have stock wires no issues either.
Well I got that familiar radiator leak well crack in the Plastic driver bottom corner is it easy to change ? The damn book time says it takes 6.5 hours that’s insane, I have done ls cam swaps faster than 6 hours start to finish .
I did this with 5.3 on 93 octane on a mustang dyno that reads 20 percent low mods are cold air intake l86 intake and Tb swap 1 7/8 inch headers no cats in temps of 101 degrees my tires are 275/60/20 k02
Look in your glove box for this picture your gear ratio should have a code like gu6 gu4 and so on if you have g80 you have a post rear end limitrd slip what ever they wanna call it . Or you could hold your brakes and see if both tires spin or smoke them .
I’m really about to buy these has anyone used them how do they fit ? https://www.speed-engineering.com/shop-by-vehicle/2014-2017-gm-trucks/exhaust/headers-y-pipes/silverado-sierra-1-7-8-headers-y-pipe-2013-4-8l-5-3l-6-0l-6-2l-truck-suv.html. Any tips for install when I order these tomorrow?
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