NEW! 598ci Super Series-12º

598 12-6
598 12-8598 12-7
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1,230 Hp/ 940 Ft.Lbs.

4.600″ Bore/ 4.500″ Stroke

(Shown with optional Black Valve Covers and Powder Coated Intake)




To Order or for More Information



Product Description

The NEW!! RMRE Super Series 598 features 12° Reher-Morrison Raptor heads. Reher-Morrison Raptor heads bring Pro Stock technology and design to Sportsman racing and contribute to this engine generating a tremendous 1,230 horsepower and 940 ft/lbs of torque.

NOTE: Tests were performed with NON-OXYGENATED fuel. The use of OXYGENATED fuels (Example: VP113 or Q16) may produce a power increase, but will require a tuning change, including increase in jet size, for optimum performance.

Download PDF: 598 12º Super Series Engine Specification Details


Engine Features

  • Dart “Big M” Cast Iron Block
  • RMRE Exclusive Design 12° Raptor Heads
  • RMRE/Manley Titanium Intake & Exhaust Valves
  • Manley 10° Titanium Valve Spring Retainers
  • RMRE CNC Installed Bronze Lifter Bore Sleeves
  • 4340 Forged Steel 8 CW Internal Balanced Crankshaft
  • 4340 Manley H-Beam Rods w/ARP 2000 Bolts
  • RMRE Spec Pistons
  • RMRE Spec Ring Sets
  • Clevitte 77 “H” Series Performance Rod/Main Bearings
  • RMRE Spec Steel Billet 7/4 Swap F.O. Roller Camshaft
  • .904″ Isky Red Zone “Centered” Roller Lifters
  • Jesel Belt Drive Timing System
  • MSD Crank Trigger Ignition System
  • RMRE Vacuum Pump Assembly
  • ATI Internal Harmonic Damper
  • RMRE Logo Valve Covers Sheetmetal/Billet Rail
  • RMRE/Moroso Wet Sump Oiling System w/Billet Oil Pump
  • RMRE Spec Single 4 Barrel Carburetor 1150cfm
  • RMRE CNC Anti-Reversion Plate w/Matching Spacer
  • T&D Shaft Mounted Aluminum Needle Tip Roller Rocker Arms 1.75/1.70

$495 Shipping to Addresses in the Continental U.S. (48 States). Residential, Out-Of Area (Extended or Remote), or Lift Gate Service, will incur Additional Charges.