ZZ6 EFI Deluxe – Chevrolet Performance Crate Engine


  • 420 hp @ 5,800 rpm
  • 408 lb-ft torque @ 4,500 rpm
  • Fast Burn design
  • Electronically controlled port fuel-injection

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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ZZ6 EFI Deluxe – Chevrolet Performance Crate Engine

The ZZ6 EFI Deluxe Crate Engine offers a perfect balance of legendary small-block performance and modern technology.

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 parts, engines and accessories and over 40 years of dedication to GM performance.

What’s Included

The ZZ6 EFI Deluxe engine assembly is sold with additional components including the intake manifold, water pump, distributor, damper, and flexplate. This complete engine comes fully assembled, using all-new high-quality components.

Important Notes

Original items such as manifolds, accessories, mounts, etc. can be transferred to a ZZ6 EFI Deluxe engine when installed in a vehicle that was originally equipped with a small block. However, there may be some dissimilar components between a ZZ6 EFI Deluxe engine and an older small block.

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

Premium unleaded fuel is required with a maximum of 10% ethanol. Leaded fuels or ethanol fuels will cause engine damage.

Get a more in-depth look at the ZZ6 EFI Deluxe Crate Engine here. P/N 19432107.

Weight 510 lbs



420 hp @ 5,800 rpm / 408 lb-ft @ 4,500 rpm

ZZ6 EFI Deluxe Tech Specs

  • Bore x Stroke (in.): 4.00 x 3.48
  • Compression Ratio: 9.72:1
  • Crankshaft: Forged steel
  • Pistons: Hypereutectic aluminum
  • Cylinder Heads: Aluminum Fast Burn-style
  • Valve Size (in.): 2.00 titanium (intake) and 1.55 (exhaust)
  • Camshaft: Hydraulic roller
  • Camshaft Lift (in.): .474 (intake) and .510 (exhaust)
  • Induction System: Electronically controlled port fuel-injection


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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