Increase the power of the LS3 engine in your C6 LS3 Corvette to 470+ hp and 440 lb.-ft. of torque with Chevrolet Performance's high-performance heads-and-cam kit. Developed by Chevrolet Performance engineers as a direct replacement for the factory-installed heads and camshaft (tuning required), with 276cc intake runners and 2.165"/1.2590" valves. The high-lift camshaft makes the most of the heads' generous airflow attributes, with .591"/.591" lift and 211°/230° duration @.05" and a 121° lobe separation angle. This kit fits other LS-family engines with at least 4" bores. Contents include the camshaft and fully assembled cylinder heads. Head gaskets and cylinder head bolts must be purchased separately. 
Same as #19300535, but includes cylinder heads, camshaft and components needed to complete the job.

part number Detail QtY
88958758 CNC LS7 Cyl Head 2
12638426 LS7 Camshaft 1
12623754 Camshaft Sprocket 1
11588723 Cam Bolts 3
12610046 Head Gasket 2
19258707 Head Bolts 20
12602540 Cover 2
12617944 Exhaust Manifold Gasket 2
12557840 Crankshaft Bolt 1