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![Cylinder Head Kit for GM LS3 Engines [w/Head Bolts]](https://www.jegs.com/images/mini_200/500/555/555-514050k.jpg)
LS3 Aluminum Cylinder Head
LS-Series LS3 Deluxe Power Upgrade KitCNC-Ported & Assembled +40 HP
Includes: LS3 Heads LS7 Camshaft Cam Sprocket Cam Bolts Head Gaskets & Bolts Covers Exhaust Manifold Gaskets Crankshaft Bolt
Includes:
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
- 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
JEGS Easy Kits are designed by JEGS Professionals to help you get all the performance parts you need.LS3 CNC Ported Head Flow Chart Valve Lift (Inches) Intake Flow (CFM) Exhaust Flow (CFM) .100 74 89 .200 178 137 .300 237 176 .400 302 228 .500 333 244 .550 348 249 .600 355 253 .700 363 258
Part TypeCylinder Head
Product LineChevrolet Performance LS3 CNC-Ported Aluminum Cylinder Head
BrandCHEVROLET PERFORMANCE
Package Height11.5
Package Width26.5
Package Length26.5
Weight70.0 PG
Part CategoryPerformance Parts
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
