Small Block Chevy

421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned

421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned
421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned
421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned
421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned
421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned
421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned
421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned
421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned
421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned

421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned

An incredibly streetable, complete, dyno-tuned and easy to install fuel-injected 421ci Small Block Chevy Street Ultra engine!! These engines feature all new components.

It starts with a blueprinted, stroker-clearanced Dart 4-bolt iron block, 4340-forged steel crankshaft, forged-aluminum full-floating pistons, file-fit moly rings, 4340-forged steel H-beam rods w/ ARP cap screws, CNC-ported aluminum heads made in the USA, high-capacity oil pan with windage screen and crank scraper built-in, high volume oiling system, Hi-RPM hydraulic roller cam and lifters. This Hardcore Horsepower engine comes equipped with your choice of an all new FAST XFI, Accel "Thruster" DFI (pictured), or Holley HP fuel injection system and computer-controlled digital ignition system! There is no other, complete EFI engine package on the market today thatll make this kind of power at this low price. And it will arrive at your door dyno-tuned and ready to run. To take the guesswork out of selecting the correct parts, weve designed this custom package to offer you the most affordable way to make big power and keep some cash in reserve.

You'll never find a better EFI engine kit than this!!! Special features of the Street Ultra EFI 421.

All parts are brand new, professionally, balanced, blueprinted, and tuned! Runs on 91/93-octane unleaded pump gas.

Accepts standard-flange headers, 1-3/4 recommended. Capable of over 600hp/600tq and daily commuting. Be the first on your block to cruise nationwide with 600hp+. The Street Ultra EFI 421 Specs.

Comp Ratio: 10.5:1. Block: Dart SHP 4-bolt; stroker clearanced, 2-pc rear main seal, driver side dipstick. Camshaft: Custom hydraulic roller, radical street grind Will not work with vac-assist power brakes.

Connecting rods: 4340-forged steel H-beam. XFI, or Accel "Thruster" DFI (pictured), or Holley. Oil pan: Steel w/ windage screen, crank scraper, and trap doors built in.

Rocker arms: Full roller aluminum 7/16 mount. Timing set: True d ouble. Note: This engine, including all components listed above, will arrive at your door fully balanced, blueprinted, painted any color of your choice, fully assembled, dyno tested & tuned, and ready to run. Engines will take approximately 4-12+ weeks to build. All Deposits and Layaway payments are non-refundable.

This engine will include all parts listed above, except where noted. Some products shown in photos may not be included. Any/all products may be changed without notice.

All products used in Hardcore Horsepower engines are protected against defects in workmanship and materials by their original manufacturers warranties. Engines used for any type of racing are not covered by any warranties. Feel free to call for more info or to customize your kit accordingly.

Photos shown are representational only. We Make It Go Fast!! To the State of California to cause. Cancer, birth defects or other. California Health and Safety Code Section 25249.6.

The item "421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned" is in sale since Monday, November 11, 2013. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Complete Engines". The seller is "mikepetraliashardcorehorsepower" and is located in Franklin, Tennessee. This item can be shipped worldwide.

  • Warranty: Yes
  • Part Brand: Hardcore Horsepower


421ci Small Block Chevy Pro-Street Engine EFI 600hp+ Built-To-Order Dyno Tuned