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1MSRP$7,158† Find Your PricePart No.12568774Resources and Registration

425hp @ 5250 rpmDyno and Tech SpecsChevrolet Performance’s most economical Big-Block crate engine delivers 500 lb-ftChevrolet 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 SPECSPart 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

I have 16.5X26 props and with trim can spin them to around 4900. I have speedmaster III drives.

Pics sent

I got them thanks.

Ttt

Ttt

Any interest? Any offers?

Pics please [email protected]

Pics sent Tig

Got them thanks. Is that Green or teal?