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GM Performance 12498772 - GM Performance ZZ383 C.I.D. 425 HP Engine Assemblies

  • Engine Assembly, Crate Engine, Chevy ZZ383, 425 hp, Each
  • Application Specific
  • Warnings
    • This part is shipped via truck freight, additional shipping charges will apply. Multiple truck freight parts on an order may increase the shipping amount.
  • Estimated Ship Date: Today
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BrandGM Performance
Manufacturer's Part Number12498772
Part TypeCrate Engines
Product LineGM Performance ZZ383 C.I.D. 425 HP Engine Assemblies
Summit Racing Part NumberNAL-12498772
 
Engine Assembly StyleLong block
AssembledYes
Engine BalanceExternal
Balance StyleExternal
Intake Manifold IncludedNo
Cylinder Heads IncludedYes
Carburetor IncludedNo
Distributor IncludedNo
Oil Pan IncludedYes
Valve Covers IncludedYes
Timing Cover IncludedYes
Water Pump IncludedNo
Harmonic Balancer IncludedYes
Flexplate IncludedYes
Flywheel IncludedNo
Air Cleaner IncludedNo
Spark Plugs IncludedNo
Spark Plug Wires IncludedNo
Computer IncludedNo
Wiring Harness IncludedNo
Rear Main Seal Style1-piece
QuantitySold individually.
NotesThis engine is not designed, nor intended to be used in any marine applications. Engines installed in vehicles registered and normally operated outside of the United States carry no warranty. Features raised runners, check Suggested Parts for proper intake manifolds.
 

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.

Warranty

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GM Performance parts are sold without a warranty. Parts thought to be defective upon initial installation can be returned for inspection and will be handled case-by-case. GM Performance transmissions, short blocks, and components are covered under the provisions of the GM Dealer Service Parts and Accessories Warranty for 12 months from the date of original sale or 12,000 miles, whichever comes first. GM Performance crate engines are covered under the provisions of the GM Dealer Service Parts and Accessories Warranty for 24 months from the original sale of 50,000 miles, whichever comes first. This excludes engines, transmissions, and components that are used in racing, competition, marine, motorcycle, or other non-vehicle usage. This also includes engines, transmissions, or components that fail due to alteration or improper use. GM Goodwrench engines installed as direct replacements in a car or light truck application are warrantied for 36 months or 100,000 miles from the time of purchase, whichever comes first. This warranty is the same regardless of who installed the engine. GM Goodwrench engines used in medium-duty truck applications (40 through 70 Series) are warrantied for 18 months with unlimited miles if installed by the dealership, or 12 months with unlimited miles if installed elsewhere. This warranty does not cover vehicles registered and normally operated outside of the United States.
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