Well my wife's 08 Yukon had a DOD/AFM lifter fail 8 months ago and it is time to finally get it fixed and back on the road. It has an all aluminum 5.3 L33 with flat top pistons, 799 heads, and the bread box intake manifold so you know a guy like me can't just tear down an engine like that without doing some modifications. Let's see how this LS responds to a bigger aftermarket Comp Cam, a Diablo Sport I3 tuner, and an exhaust modification.

If you want your own Comp Cam head over to https://compcams.com @Compcams1976

Here is a link to the tuner we used from Diablo Sport https://www.holley.com/account/wishli...
Check out the Holley home page at https://tag.gs/3m47
#winwithholley @HolleyPerformance @DiabloSportInc

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