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MSRP

$7,158

Part No.

12568774

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For Off-Road &

For Off-Road &
STREET

6 Select
Available Mods

Power

Power
425
hp @ 5250 rpm

Chevrolet Performance’s most economical Big-Block crate engine delivers 500 lb-ft

Chevrolet Performance’s 454 HO crate engine is classic in its own time, offering enthusiasts an affordable Big-Block combination with performance specs that will make you think it’s 1970 all over again — with 425 horsepower and 500 asphalt-wrinkling lb-ft of torque.

The foundation of the 454 HO is a brand-new, updated cylinder block, which incorporates many strength and performance design enhancements – making it a smart and economical alternative to rebuilding. We also add an all-forged reciprocating assembly for maximum durability, a roller camshaft, and a set of rectangular-port iron cylinder heads.

We deliver the 454 HO with a water pump, balancer, 14-inch flexplate, and aluminum intake manifold. Add a carburetor, ignition system, and starter and your budget Big-Block will be ready to roar. All of the necessary parts are available from Chevrolet Performance.

If you want the strength and convenience of the 454 HO bottom end, but want to add your own heads and induction system, use our 454 partial engine (P/N 12498778).

454 HO DYNO

Click on the slider to see the torque and power ratings change with rpm.*

*Approximate values shown.

454 HO TECH SPECS

Part Number:
12568774
 
 
Engine Type:
Chevy Big-Block V-8
Displacement (cu. in.):
454
Bore x Stroke (in.):
4.250 x 4.000
Block (P/N 19170538):
Cast-iron with four-bolt main caps
Crankshaft (P/N 14096983):
Forged steel
Connecting Rods (P/N 19170198):
Forged steel
Pistons (P/N 10215228):
Forged aluminum
Camshaft Type (P/N 24502611):
Hydraulic roller
Camshaft Lift (in.):
.510 intake / .540 exhaust
Camshaft Duration (@.050 in.):
211° intake / 230° exhaust
Cylinder Heads (P/N 12562920):
Iron rectangular port; 118-cc chambers
 
 
Valve Size (in.):
2.190 intake / 1.880 exhaust
Compression Ratio:
8.75:1
Rocker Arms (P/N 12523976):
Stamped steel
Rocker Arm Ratio:
1.7:1
Water Pump (P/N 19168606):
Cast-iron, long-style
Flexplate (P/N 10185034):
14"
Recommended Fuel:
92 octane
Ignition Timing:
Base 4° BTDC, 26° Total
Maximum Recommended rpm:
5500
Balanced:
External

OWNER RESOURCES

Already own one, but lost some of the paperwork? We’ve got you covered with downloads and links for some of the more important documents below. You’ll find everything from the vital data about your engine’s capabilities to how to install it into your build, even all of the warranty information should you need to make a claim. And don’t forget, the best way we can make sure to get you the latest information on your specific part is to tell us which one you have by registering your engine. No matter what stage of your build you’re in — from shopping for the right part to that part having turned in a few miles — we have the information you need.

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  • INSTALLATION NOTES

    • Requires addition of carburetor, starter, fuel pump, distributor, and ignition system (not included)
    • Clutch linkage bosses are now drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need
      to be replaced with bolts with shorter heads for clearance
    • Comes with an externally balanced 14" automatic transmission flexplate; use flywheel P/N 14096987 and 11" clutch assembly for manual transmission applications
    • Designed for pre-1976 street vehicles or any off-road vehicle
    • Not intended for marine applications
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FINISH OFF YOUR CRATE ENGINE WITH THESE SELECT PARTS

Download a catalog for a full listing of components and related parts.

SuperMatic 4L85-E Four-Speed
Transmission • P/N 19154550

HEI Distributor • P/N 93440806

Download Catalog

Short Chrome Bowtie Valve Cover • P/N 12342093

Fuel Pump, Street Performance (Chevy Big-Block)
• P/N 12355614

Transmission Controller • P/N 19212657

Carburetor, Holley 77-cfm • P/N 19170093

  • 1 Performance MSRP The Manufacturer's Suggested Retail Price excludes tax, shipping and installation.