GM Performance Engine Assembly, Crate Engine, Chevy, 454 HO, 438 hp, Cast Iron Rectangle Port
Part Number:GMP-12568774
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GM Performance Engine Assembly, Crate Engine, Chevy, 454 HO, 438 hp, Cast Iron Rectangle Port Heads, Each (PART #GMP-12568774)
The GM Performance 454 c.i.d. HO offers tremendous value in a long block crate engine. It's based on the Gen VI 4-bolt mains with 1-piece rear main seal blocksawith approximately 8.75:1 compression, 438 hp at 5,300 rpm, and 500 lbs.-ft. of torque at 3,500 rpm. The "HO" stands for High Output, which means you get forged steel externally balanced crankshafts, forged steel LS6/LS7 "dimple" rods, shot peened and magnafluxed with 7/16 in. rod bolts.
Other features and specs include:
- Forged aluminum pistons
- Hydraulic roller camshafts with .510 in. intake lift, .540 in. exhaust lift
- Duration at .050 in. for intake is 211 and 230 for exhaust; lobe centerline is 112 degrees
- Cast iron cylinder heads with rectangular port 118cc combustion chambers
- 325cc intake runner volume with 2.19 in. intake valves and 1.88 in. exhaust
- Heads are configured for 3/8 in. thread 7/16 in. shank rocker arm studs
- Stamped steel self-aligning 1.7:1 ratio rocker arms come installed along with ACDelco spark plugs
- Also included with this crate engine: oil pan, black powdercoated aluminum valve cover, black powdercoated aluminum timing cover, long-style cast iron "V" belt rotation water pump, 8 in. harmonic balancer, and 14 in. automatic flexplate
SPECIFICATIONS |
|
| Brand | GM Performance |
| Manufacturer's Part Number | 12568774 |
| Part Type | Crate Engines |
| Product Line | GM Performance 454 C.I.D. HO 438 HP Long Block Crate Engines |
| Crate Engine Family | Chevy Big Block |
| Actual Engine Displacement | 7.4L/454 |
| Crate Engine Cylinder Head Material | Cast iron |
| Engine Block Material | Cast iron |
| Assembled | Yes |
| Engine Balance | External |
| Cam Style | Hydraulic roller, OE roller |
| Rear Main Seal Style | 1-piece |
| Intake Manifold Included | Yes |
| Intake Manifold Style | Carbureted |
| Cylinder Heads Included | Yes |
| Carburetor Included | No |
| Throttle Body Included | No |
| Distributor Included | No |
| Oil Pan Included | Yes |
| Valve Covers Included | Yes |
| Timing Cover Included | Yes |
| Water Pump Included | Yes |
| Harmonic Balancer Included | Yes |
| Flexplate Included | Yes |
| Flywheel Included | No |
| Air Cleaner Included | No |
| Spark Plugs Included | No |
| Spark Plug Wires Included | No |
| Computer Included | No |
| Wiring Harness Included | No |
| Supercharger Included | No |
| Remanufactured | No |
| Quantity | Sold individually. |
| Notes | This engine is not designed, nor intended to be used in any marine applications. Designed for pre-1976 street vehicles or any off-road vehicle. Engines installed in vehicles registered and normally operated outside of the United States carry no warranty. Clutch linkage bosses are drilled and tapped, plus includes a provision for a mechanical fuel pump. |
