GMP-4L806ZZ427-2X - Pace Prepped & Primed ZZ427 505HP with Black Finish Engine with 4L80E 6 Speed Transmission Package

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GMP-19166393-2X - Pace Prepped & Prime ZZ427 505HP Black Finish Crate Engine with GM Muscle Car Oil Pan Includes:
• Pace engine prep and oil priming service. Click Here for more information.
• Fully GM assembled long block
• Black Cast Aluminum Valve Covers with 427 Logo
• Chevrolet Performance 4 Quart oil pan
• Edelbrock RPM Air-Gap, Black powder-coated Intake
• Hand built AED 750CFM Holley mechanical secondary carb with electric choke
• Performance mechanical fuel pump with plumbing to carb
• HEI Distributor, plug wires and spark plugs
• 14” Auto Trans Flexplate
• HD Starter with bolts
• 8” Harmonic Balancer
• Front timing cover
• Cast Aluminum Short Water Pump
• Oil Filter Adapter
• Passenger Side RH Oil Dipstick and Tube
• Includes Oil Filter and Pace Performance recommended break in oil: Shipped in Pan

General Motors limited 2 year / 50,000 mile parts & labor warranty. Click Here to view or download warranty form.

There are few engines that conjure up images of greatness like the 427 Chevy big-block. The ZZ427 big-block crate engine brings back all of the good things that you remember about the 427 with a few modern new upgrades. With an updated cast iron block, a 10.1:1 final compression ratio, and an aggressive hydraulic roller camshaft, the ZZ427 offers you outstanding performance while still living on low octane fuel.

The legendary 427" big-block Chevy powered some of the most storied cars in the history of the high performance automobile. This latest version holds true to that tradition, offering you a tough, 4-bolt main cast iron block with an all forged internal rotating assembly. The top half of the engine is aluminum oval-port heads that use 2.19" intake and 1.88" exhaust valves work wtih 1.7:1 aluminum roller rockers and a .527" intake/.544" exhaust camshaft. The intake is a matching high-flow aluminum oval-port piece that gets fed the air/fuel mix from a 750-cfm carburetor. An HEI distributor, aluminum water pump, spark plug wires, and a 14" flexplate round out the package. Internally balanced, the ZZ427 will spin to 6000 rpm before it's time for you to shift.

The ZZ427 is an exciting trip back to one of the high points in the history of the Chevrolet big-block. With a rating of 505 horsepower and loads of torque, it's still one of the best crate engines for just about any big-block application.

Power: 505 HP @ 5900 RPM, 514 ft. lbs. of torque @ 4100 RPM
Displacement: 427 CID
Bore x Stroke: 4.250” x 3.750”
Compression Ratio: 10.1:1
Recommended Fuel: 92 Octane
Block: Cast Iron, 1 piece rear seal, 4-bolt main caps
Crankshaft: Forged Steel
Connecting Rods: Forged Steel
Pistons: Forged Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .527” Intake / .544” exhaust
Cam Duration @ .050”: 224 deg. Intake / 234 deg. Exhaust
Lobe Separation: N/A
Cylinder Heads: Aluminum Oval Port.
Combustion Chamber: 110cc
Valves: 2.190” Intake/ 1.880” Exhaust
Rocker Arms: Aluminum Roller, 1.7:1 Ratio
Balance: Internal
Maximum GM Recommended RPM: 6400
Ignition Timing: Base 10 degrees BTDC, 36 degrees total

Performance Automatic 4L80e 6-Speed Transmission Packages

Performance Automatic 4L80E 6-Speed automatics are designed and built with the best parts available today. The 6 speed has a upgraded gear ratio spread for those vehicles that need the most out of their transmission. This is also switchable to a 4 speed with the touch of a button should you desire!. Also includes Performance Automatic's exclusive Quik Connect Program, a comprehensive program that contains easy to follow instructional video and personalized technical assistance. After you register your product, you will have access over the internet to informative installation and operational videos specific to your specific vehicle and driving habits. You will also have access to two (2) additional custom transmission programs.

4L80E 6-Speed Package Includes:

• Stage I 4L80E transmission rated for 650HP
• Raybestos Stage 1 HP Performance Clutches
• Raybestos Stage Pro Kick Down Band
• High Performance Internal Sprag
• New Pressure Control Manifold
• New Internal Wiring
• New Solenoids
• Reprogrammed Pump Assembly
• 300mm Input Shaft
• Billet Forward Clutch Hub
• New Steel Pan
• New Speed Sensors
• 10" Single Disc Torque Converter
• Transmission Controller & Wiring Harness
• Dipstick & Filler Tube
• Torque Convertor Inspection Cover
• Transmission Mount
• Bolt & Hardware Package
• 2 Year Limited Warranty

Upgraded performance gear ratio spread
2.98 1st gear
2.24 2nd gear
1.57 3rd gear
1.18 4th gear
1.00 5th gear
0.075 6th gear

Click on Documents Tab for Warranty Statement

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  • Item Requires Shipping
  • 500.0 lbs.
  • Free Shipping!
  • FREE 48 State Truck Freight Shipping (International shipping will require freight quote)

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