GM LS Heads #243M
$225 each with exchange ($150 core)
Includes: All new Valves, Springs, Retainers, Locks, and Seals
Specifications
- 1.29″ OD
- 130 lbs @ 1.800 closed
- 318 lbs @ 1.200 open
- 1.120 coil bind
- .600 max lift
5.3L/5.7L LM7 Short Block
$1,725 exchange
$1,325 exchange (without Camshaft)
($225 core)
| Block | Gen III 4.8/5.3 |
| Bore/Stroke | 4.000 x 3.622 |
| Year Range | Any |
| Crankshaft | OEM Reground Internally Balanced 24 tooth |
| Connecting Rods | OEM Rods with ARP 8740 Bolts |
| Pistons | Hypereutectic Pistons Flat Top 6.0L 3517HC |
| Piston Rings | Moly Rings 2M4860 |
| Compression Ratio | Varies by CC Heads |
| Camshaft | Elgin Performance Roller Camshaft of choice |
| Timing Chain | Elgin TC-3210 |
| Camshaft Bearings | Installed & Clocked to OEM Position |