GM Performance
GM Performance ZZ383 Chev Zz 383 425HP Alloy Headed Long GM Motor - New
GM Performance ZZ383 Chev Zz 383 425HP Alloy Headed Long GM Motor - New
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Get big block power with a small block price tag!
These all-new GM Performance ZZ383 crate engines offer big block performance with a small block price tag. With the GM Performance Parts "Fast Burn Heads" on a 383 c.i.d., this combo offers approximately 9.1:1 compression with 425 hp at 5,400 rpm and 449 ft./lbs. of torque at 4,500 rpm. These blocks have 4-bolt mains with 1-piece rear main seals, forged steel externally balanced crankshafts, 5.7 in. powdered metal connecting rods, hypereutectic flat top pistons with offset pins. Billet steel hydraulic roller camshafts are install with .509 in. intake lift, .528 in. exhaust lift, and duration at .050 in. for intake is 222 and 230 for exhaust with a lobe centerline of 112 degrees. Aluminum full roller self-aligning rocker arms are used with 1.5:1 ratios. Heads are GM Performance Parts "Fast Burn" heads with 62cc combustion chambers, 210cc intake runner volume "Fast Burn" combustion chambers with 2.00 in. lightweight hollow stem intake valves and 1.55 in. sodium filled exhaust valves. LT4 Corvette valve springs and lightweight retainers are used. These heads have "D" shaped exhaust ports and have dual bolt pattern intake manifold and valve cover configurations. Cast iron long leg, standard "V" belt rotation water pumps with 1979-86 power steering pump boss. Addition items that are included with these crate engines are 8 in. harmonic balancers, 12 3/4 in. automatic flexplates, 4 quart oil pans with windage trays, painted valve covers with oil cap, grommets, provisions for PCV and breathers. Composite front timing covers, spark plugs, engine oil dipstick and tube passenger side location. Brass freeze plugs, fuel pump block plates and engine lift taps for an easy install.Specifics
| Brand | GM Performance |
| Manufacturer's Part Number | 12498772 |
| Part Type | Crate Engines |
| Product Line | GM Performance ZZ383 C.I.D. 425 HP Engine Assemblies |
| Part Number | NAL-12498772 |
| Engine Assembly Style | Long block |
| Assembled | Yes |
| Engine Balance | External |
| Balance Style | External |
| Intake Manifold Included | No |
| Cylinder Heads Included | Yes |
| Carburetor Included | No |
| Distributor Included | No |
| Oil Pan Included | Yes |
| Valve Covers Included | Yes |
| Timing Cover Included | Yes |
| Water Pump Included | No |
| 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 |
| Rear Main Seal Style | 1-piece |
| Quantity | Sold individually. |
| Notes | This engine is not designed, nor intended to be used in any marine applications. . Features raised runners, check Suggested Parts for proper intake manifolds. |
Manufacturer Part Number:
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