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ATK SP411P Chevy 489/496CI Stroker Short Block +20cc Dome Pistons

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#35020234

ATK SP411P Chevy 489/496CI Stroker Short Block +20cc Dome Pistons

Block: Seasoned 6.0L Iron Gen IV
Bore/Stroke: 4.030" x 3.622"
Displacement (cu.in): 370

$5,277.00

/each

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Product Summary

Short Block Crate Engine Type, No Value Engine Balance

Block: Seasoned 6.0L Iron Gen IV
Bore/Stroke: 4.030" x 3.622"
Displacement (cu.in): 370
Crankshaft: OE reground 3.622" internally balanced 24 tooth
Rods: Scat 4340 forged I beam 6.125" ARP 8740 bolts

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Key Specs

Crate Engine Type	Short Block
Engine Displacement	454 cu. in.
Camshaft Type	Hydraulic Roller
Piston Material	Forged Aluminum
Crankshaft Material	Forged 4340 Steel

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Need To Know

Made to Order

This custom item will ship when completed

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

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855.313.9176

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ATK Engines SP41-1P Details

Engine Specifications:

Block: OE seasoned 454 block 4 bolt main 1pc seal 1991-1995 Gen V

Bore/Stroke: up to 4.310” x 4.200”

Displacement: 489/496

Crankshaft: Scat 4340 forged 4.250” stroke internally balanced 1pc seal

Rods: Scat 4340 forged H beam 6.385” with ARP 8740 bolts

Pistons: Forged +20cc dome

Compression Ratios: 112cc = 10.9:1 / 118cc = 10.4:1 / 124cc = 9.9:1 (can vary due to deck height/gasket thickness)

Rings: Plasmamoly

Camshaft Bearings: Dura-Bond, installed and clocked to OEM position

Freeze Plugs: Brass, installed and sealed

Oil Galley Plugs: Installed and sealed

Recommended Components:

Balancer: Internal balance

Flexplate/Flywheel: Internal balance

Head Gasket: .038” or per application

Engine Info:

Oil: 10W30 Non synthetic for first 3000 miles

Oil Filter: Wix or K and N per application

Notes:

No mechanical fuel pump provisions

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.

Guides & Documents

Warranty (ATK Engines)

Technical Information (ATK Engines)

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

ATK Engines SP41-1P Specifications

KEY SPECS
MFG. Part #	SP41-1P
Brand	ATK Engines
Crate Engine Type	Short Block
Engine Displacement	454 cu. in.
Camshaft Type	Hydraulic Roller
Piston Material	Forged Aluminum
Crankshaft Material	Forged 4340 Steel
Carburetor Included	No
Intake Manifold Included	No
Distributor Included	No
Connecting Rod Material	Forged 4340 Steel
Valve Covers Included	No
Cylinder Heads Included	No
Throttle Body Included	No
Timing Cover Included	No
Oil Pan Included	No
Water Pump Included	No
Harmonic Balancer Included	No
Flexplate Included	No
Flywheel Included	No
Air Cleaner Included	No
Spark Plugs Included	No
Spark Plug Wires Included	No
Computer Included	No
Wiring Harness Included	No

GENERAL
Bore x Stroke (in)	4.310" x 4.20"
Assembled	Yes
Material Type	Cast Iron
Notes	GM 1991-95 Gen V big block with 4.310 in. bore and 4.250 in. stroke, +20cc domed pistons, Scat forged 6.385 in. connecting rods, ARP 8740 rod bolt,s and moly rings.
Sold in Quantity	Each
Connecting Rod Beam Style	H-Beam
Piston Style	Dome

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396 Chevy Big Block V8

1971-1972 GMC C25/C2500 Suburban

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