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427 IR.jpg

roush 427 Ir stroker 560hp 535ft/lbs

  • New Dart Sportsman Block

  • 4340 Forged Crank and H beam rods

  • Aluminum CNC Ported Cylinder Heads

  • 8-Stack Intake

  • Roush Valve Cover

  • Hydraulic roller cam

  • New High Torque Starter

  • Roush aluminum underdrive pulley system

  • Roush Spark Plug Wires

  • 1.6 Roller rockers

  • MSD Coil

  • Accelerator cable

  • MSD Billet Distributor

  • Electronic Fuel Injection

  • Braided Fuel Line

  • SFI approved billet steel flywheel

  • New Alternator 90 amp

  • Electric Fuel Pump

  • Powder coated 8-qt T style Oil Pan

  • 10.25:1 Compression

  • 2-Year/24,000-mile limited warranty

  • Hot Tested


  • Full Engine Polish  $ T B D

  • Upgrade to T56 Trans  $ 1,800

  • Upgrade to 6R80 Automatic Trans $ 8,000

  • Oil Cooler  $ 1,200

Tremec tkx transmission


  • New Transmission

  • Quicktime Steel Bellhousing

  • Internal Hydraulic Release Bearing

  • RAM Dual Performance Clutch Kit



$ 42,000, this includes the installation of the above mentioned power train. These prices are subject to availability and may be changed at any time.

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov


Each IR Series engine is hot tested, then dyno tested to verify power. All IR Series engines are shipped with documentation and carry a two-year limited warranty with Roush.

This part is designed and intended for competition use or off-highway use only

Installation of this part on a vehicle driven on public roads and highways may violate U.S. laws and regulations relating to motor vehicle emissions.

base model


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