Engine/PerformanceThe truck started as a 2500HD with a LQ4 6.0. When I got it the engine was in amazing shape, but just wasn't enough for me. So we tore the entire thing down and install probillet flat top pistons bringing the compression to 10:1, while installing that I installed hardened push rods and a GT2/GT3 cam. The heads are the same 317 casting. So the engine is identical to the LQ9 found in the SS. The engine was then tuned by BlackBear performance. Long Tube headers where then installed from PaceSetter and a magnaflow race series muffler was added.