454 HO Crate Engine – Chevrolet Performance 454 HO Crate Engine


  • 438 hp @ 5,300 rpm/500 lb.-ft. @ 3,500 rpm
  • Rectangular-port heads w/ 2.19/1.88-inch valves
  • Hydraulic roller camshaft .510 int./.540 exh. lift
  • Chevrolet Performance dual-plane aluminum intake

Have your engine dyno tested by one of our professional engine builders to ensure everything is properly broken in. We can dyno your engine with your components to make sure everything is working harmoniously before shipping you the whole assembly drained and ready to install.

Shipping is free, but there is a delivery fee for residential addresses.

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454 HO Crate Engine

Big Torque on a Budget!

The Chevrolet Performance 454 HO crate engine is a Big-Block bargain. It’s an affordable engine with performance specs that will make you think it’s 1970 all over again!

A new-style block casting with four-bolt main caps includes an all-forged rotating assembly for great strength and durability. It also uses a smooth hydraulic roller camshaft for excellent drivability and asphalt-wrinkling performance. Rectangular-port cylinder heads with large, 2.19/1.88-inch valves, round out the assembly.

Karl’s Kustoms is here to help you make your next build the best it can be, as a top-rated retailer of Chevy performance engines, parts, and accessories, and over 40 years of dedication to GM performance.

What’s Included

The package includes a water pump, balancer, 14-inch flexplate and an aluminum intake manifold. Simply add a carburetor, ignition system and starter and your muscle car or street rod will be ready to roar.

Important Notes

Original items such as manifolds, accessories, mounts, etc. can be transferred to a 454 HO engine, when installed in a vehicle that was originally equipped with a big block. However, there may be some dissimilar components between a 454 HO engine and an older big block.

Installing this engine in a vehicle not originally equipped with a big block engine may require modifications or additional components not included, such as fabricating various components for the cooling, fuel, electrical, and exhaust systems.

Recommended Transmission: SuperMatic 4L85-E Four-Speed Automatic P/N 19300175 or T56 Super Magnum 6-Speed Manual P/N 19329795

Note: Distributor with melonized steel gear MUST be used with long blocks and partial engines with steel camshafts, or engine damage will occur. GMPP HEI distributor P/N 93440806 is recommended.

Weight 590 lbs



454 HO Tech Specs

  • Engine Type: Chevy Big Block V-8
  • Displacement (cu in): 454
  • Bore x Stroke (in): 4.250 x 4.000
  • Block: Cast-iron with 4-bolt main caps (P/N 19170538)
  • Crankshaft: Forged steel (P/N 14096983)
  • Connecting Rods: Forged steel (P/N 19170198)
  • Pistons: Forged aluminum (P/N 10215228)
  • Camshaft Type: Hydraulic roller (P/N 24502611)
  • Camshaft Lift (in): .510 intake / .540 exhaust
  • Camshaft Duration (@.050 in): 211° intake / 230° exhaust
  • Cylinder Heads: Iron rectangular port; 118cc chambers (P/N 12562920)
  • Valve Size (in): 2.190 intake / 1.880 exhaust
  • Compression Ratio: 8.75:1
  • Rocker Arms: Stamped steel (P/N  12523976)
  • Rocker Arm Ratio: 1.7:1
  • Water Pump: Cast-iron, long-style (P/N 19168606)
  • Flexplate: 14″ (P/N 10185034)
  • Recommended Fuel: Premium Pump
  • Ignition Timing: Base 4° BTDC, 36° Total @ 4,000 rpm
  • Maximum Recommended rpm: 5,500
  • Balanced: External


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

Click here to download installation information.

Chevrolet Performance Crate Engines carry a 24 Month or 50,000 mile warranty (whichever comes first) when installed by a qualified independent service center. Chevrolet Performance Crate Engines also come with a 30 day start up warranty (parts only).

There are some additional limitations on the warranty – please see the official GM warranty documentation for more information.


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Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

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