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ATK HP451PM Chevy 454 Mid Dress Engine 525HP

$275 Shipping

#35020230

ATK HP451PM Chevy 454 Mid Dress Engine 525HP

Classic 454 with modern internals rated at 525 HP
Forged bottom end and aluminum heads for enhanced durability
Hydraulic roller camshaft for smooth power delivery

Level Of Dress:

#2 Mid Dress

$8,699.00

/each

Factory Shipped

Quantity

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Product Summary

Long Block Crate Engine Type, 9.9:1 Compression Ratio

Classic 454 with modern internals rated at 525 HP
Forged bottom end and aluminum heads for enhanced durability
Hydraulic roller camshaft for smooth power delivery
Mid-dress package includes intake, timing, and oil system
Ideal for restomods, muscle cars, and performance builds

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Key Specs

Crate Engine Type	Long Block
Engine Displacement	10.3 liters
Compression Ratio	9.9:1
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum

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Need To Know

Truck Shipment

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

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ATK Engines HP451PM Details

Engine Specifications:

HP: 525
TQ: 550
Block: OE block 1991-1995 Gen V 4 bolt main 1pc seal (NO MECHANICAL FUEL PUMP PROVISION)
Bore/Stroke: up to 4.310” x 4.000”
Displacement: 454
Crankshaft: OE Reground external balance
Rods: OE powder metal 6.135”
Pistons: Forged 9.9:1 compression
Rings: Moly
Camshaft: Hyd. roller
Cam Specs: 225/235 @50 .595in/.601ex 112LSA
Timing Chain: Double roller
Cylinder Heads: ATK aluminum
Rocker Arms: Billet aluminum 1.7 ratio
Oil Pan: Rear sump
Oil Pump: Melling high volume
Balancer: PowerBond external balance 8” #PB1451-N
Flexplate/Flywheel: Pioneer #FRA-321 external balance 168 tooth
Intake Manifold: Edelbrock performer RPM dual plane #7161
Distributor: HEI (Iron gear)
Water Pump: OE long pump

Recommended Components:

Carburetor: Quick Fuel 780CFM vacuum secondary’s with electric choke #HR-780
Fuel Pump: No mechanical fuel pump provision, must run an electric pump
Spark Plugs: Autolite #3923
Spark Plug Wires: 8mm

Engine Info:

Oil: Conventional / Non Synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles
Oil Filter: Wix or K and N per application
Timing: 34-36 Degrees
Spark Plug Gap: .035”
Firing Order: 18436572
Octane: 91+
Stall Converter: 2200-2500
Exhaust: 1 5/8 Headers

Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. 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 Prop 65

CARB warning

ATK Engines HP451PM Specifications

KEY SPECS
MFG. Part #	HP451PM
Brand	ATK Engines
Crate Engine Type	Long Block
Engine Displacement	10.3 liters
Compression Ratio	9.9:1
Camshaft Type	Hydraulic Roller
Cylinder Head Material	Aluminum
Carburetor Included	No
Intake Manifold Included	Yes
Distributor Included	Yes
Valve Covers Included	Yes
Engine Balance	External
Cylinder Heads Included	Yes
Rear Main Seal Style	1-piece
Throttle Body Included	No
Oil Pan 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

GENERAL
Assembled	Yes
Material Type	Cast Iron
Sold in Quantity	Each
Crate Engine Family	Chevy Big Block
Supercharger Included	No

Ratings & Reviews

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Fitment

1970-1975 Chevy Bel Air

454 Chevy Big Block V8

1970-1972 Chevy Biscayne

454 Chevy Big Block V8

1970-1972 Chevy Brookwood

454 Chevy Big Block V8

1973-1979 Chevy C10

454 Chevy Big Block V8

1973-1979 Chevy C10 Suburban

454 Chevy Big Block V8

1988 Chevy C15

454 Chevy Big Block V8

1990 Chevy C1500

454 Chevy Big Block V8

1991 Chevy C1500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Mark IV 454 LS5

1992-1993 Chevy C1500

454 Chevy Big Block V8

1973-1987 Chevy C20

454 Chevy Big Block V8

1973-1986 Chevy C20 Suburban

454 Chevy Big Block V8

1991 Chevy C2500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy C2500

454 Chevy Big Block V8

1996-1997 Chevy C2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1992-1995 Chevy C2500 Suburban

454 Chevy Big Block V8

1996-1997 Chevy C2500 Suburban

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1973-1986 Chevy C30

454 Chevy Big Block V8

1988-1990 Chevy C3500

454 Chevy Big Block V8

1991 Chevy C3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy C3500

454 Chevy Big Block V8

1996-1997 Chevy C3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1970-1976 Chevy Caprice

454 Chevy Big Block V8

1970-1973 Chevy Chevelle

454 Chevy Big Block V8

1970-1974 Chevy Corvette

454 Chevy Big Block V8

1970-1975 Chevy El Camino

454 Chevy Big Block V8

1970 Chevy Estate

454 Chevy Big Block V8

1996-2000 Chevy Express 2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1996-2000 Chevy Express 3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1988-1990 Chevy G30

454 Chevy Big Block V8

1991 Chevy G30

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy G30

454 Chevy Big Block V8

1996 Chevy G30

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1970-1976 Chevy Impala

454 Chevy Big Block V8

1973-1974 Chevy K10

454 Chevy Big Block V8

1973-1974 Chevy K10 Suburban

454 Chevy Big Block V8

1973-1974 Chevy K20

454 Chevy Big Block V8

1973-1974 Chevy K20 Suburban

454 Chevy Big Block V8

1985 Chevy K20 Suburban

454 Chevy Big Block V8

1991 Chevy K2500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy K2500

454 Chevy Big Block V8

1996-1997 Chevy K2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1992-1995 Chevy K2500 Suburban

454 Chevy Big Block V8

1996-1997 Chevy K2500 Suburban

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1977-1986 Chevy K30

454 Chevy Big Block V8

1988-1990 Chevy K3500

454 Chevy Big Block V8

1991 Chevy K3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 Chevy K3500

454 Chevy Big Block V8

1996-1997 Chevy K3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1970-1972 Chevy Kingswood

454 Chevy Big Block V8

1973-1975 Chevy Laguna

454 Chevy Big Block V8

1973-1975 Chevy Malibu

454 Chevy Big Block V8

1970-1975 Chevy Monte Carlo

454 Chevy Big Block V8

1975-1990 Chevy P30

454 Chevy Big Block V8

1991 Chevy P30

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Mark IV 454 LS5

1992-1995 Chevy P30

454 Chevy Big Block V8

1996-1997 Chevy P30

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1973-1974 Chevy P30 Van

454 Chevy Big Block V8

1987-1988 Chevy R20

454 Chevy Big Block V8

1987-1988 Chevy R20 Suburban

454 Chevy Big Block V8

1989 Chevy R2500

454 Chevy Big Block V8

1989-1990 Chevy R2500 Suburban

454 Chevy Big Block V8

1991 Chevy R2500 Suburban

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1987-1988 Chevy R30

454 Chevy Big Block V8

1989-1990 Chevy R3500

454 Chevy Big Block V8

1991 Chevy R3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1970-1972 Chevy Townsman

454 Chevy Big Block V8

1987-1988 Chevy V20 Suburban

454 Chevy Big Block V8

1990 Chevy V2500 Suburban

454 Chevy Big Block V8

1987-1988 Chevy V30

454 Chevy Big Block V8

1989-1990 Chevy V3500

454 Chevy Big Block V8

1991 Chevy V3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1975-1978 GMC C15

454 Chevy Big Block V8

1975-1978 GMC C15 Suburban

454 Chevy Big Block V8

1973-1974 GMC C15/C1500 Pickup

454 Chevy Big Block V8

1973-1974 GMC C15/C1500 Suburban

454 Chevy Big Block V8

1979 GMC C1500

454 Chevy Big Block V8

1979 GMC C1500 Suburban

454 Chevy Big Block V8

1975-1978 GMC C25

454 Chevy Big Block V8

1975-1978 GMC C25 Suburban

454 Chevy Big Block V8

1973-1974 GMC C25/C2500 Pickup

454 Chevy Big Block V8

1973-1974 GMC C25/C2500 Suburban

454 Chevy Big Block V8

1979-1986 GMC C2500

454 Chevy Big Block V8

1988-1990 GMC C2500

454 Chevy Big Block V8

1991 GMC C2500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 GMC C2500

454 Chevy Big Block V8

1996-2000 GMC C2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1979-1986 GMC C2500 Suburban

454 Chevy Big Block V8

1992-1995 GMC C2500 Suburban

454 Chevy Big Block V8

1996-1999 GMC C2500 Suburban

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1975-1978 GMC C35

454 Chevy Big Block V8

1979-1986 GMC C3500

454 Chevy Big Block V8

1988-1990 GMC C3500

454 Chevy Big Block V8

1991 GMC C3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 GMC C3500

454 Chevy Big Block V8

1996-2000 GMC C3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1994-1999 GMC K2500 Suburban

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1977-1978 GMC K35

454 Chevy Big Block V8

1979-1986 GMC K3500

454 Chevy Big Block V8

1988-1990 GMC K3500

454 Chevy Big Block V8

1991 GMC K3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1992-1995 GMC K3500

454 Chevy Big Block V8

1996-2000 GMC K3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1987-1989 GMC R2500

454 Chevy Big Block V8

1987-1990 GMC R2500 Suburban

454 Chevy Big Block V8

1991 GMC R2500 Suburban

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1987-1990 GMC R3500

454 Chevy Big Block V8

1991 GMC R3500

Chevy Big Block V8 Mark IV 454 L19
Chevy Big Block V8 Gen 5 454 L19

1996-2000 GMC Savana 2500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1996-2000 GMC Savana 3500

Chevy Big Block V8 Gen 5 454 L19
Chevy Big Block V8 Gen 6 ZZ454 454

1971-1977 GMC Sprint

454 Chevy Big Block V8