LS Series LS3 Deluxe Power Upgrade Kit -19301990

The Chevrolet Performance LS3 CNC-Ported Aluminum Cylinder Head design benefits from General Motors' extensive research and development program, ensuring maximum airflow without compromises. In fact, many professional builders use this head as straight bolt-ons, with no further machining. These assembled heads use premium machining and materials, including CNC finishing and porting, along with lightweight, hollow-stem intake valves and sodium-filled exhaust valves to provide your engine with the power increase you have been searching for!

Features

• Manufactured from 319-T5 aluminum alloy
• 2.165" Hollow Stem Intake Valves
• 1.590" Solid Stem Exhaust Valves
• 15 degree valve angle
• 276cc CNC'd intake ports
• 92cc CNC'd D-shaped exhaust ports
• 68.5cc combustion chambers (maintains stock LS3 compression ratio!)
• .550" max valve lift with installed springs
• Symmetrical intake and exhaust ports
• High-efficiency combustion chambers
• 14mm, 5/8" hex, 3/4" reach, taper-seat Angled spark plug
• Bolt-down-type rocker arms
• Center-bolt valve cover hold-downs
• Design for any LS engine with cylinder bores of 4.000 inches or larger, including 6.2L L92 truck engines
• All fasteners are metric
• 10% increase in airflow over factory LS3 head

Kit Includes:

• Chevrolet Performance LS3 Assembled Cylinder Head  (2) - 88958758
• Chevrolet Performance LS7 Camshaft - 12638426
• Chevrolet Performance Camshaft Sprocket - 12623754
• Chevrolet Performance Cam Bolts (3) - 11588723
• Chevrolet Performance Head Gaskets (2) - 12610046
• Chevrolet Performance Head Bolts (20) - 19258707
• Chevrolet Performance Head Bolts (10) - 12558840
• Chevrolet Performance Air Bleed Covers (2) - 12602540
• Chevrolet Performance Exhaust Manifold Gaskets (2) - 12617944
• Chevrolet Performance Crankshaft Bolt - 12557840