5.2″ Bore space
5.3″ Bore space
These proprietary Billet cylinder heads are the culmination of many years in the research and development of Nitrous head technology. These are the same heads responsible for record setting performance in Nitrous Pro Mod racing. Used by more race winners than any other! They are designed and manufactured in a joint effort between Reher Morrison and Dart Machinery. Once the baseline heads are machined at Darts facility they come to Reher Morrison for further machining of valve train, seats and guides and are then fully CNC ported, hand finished and meticulously prepared for competition.
• Proprietary port designs and valve train.
• Fully machined water jacket (More uniform cooling when compared to other Pro Mod heads currently available)
• Many CNC port programs to choose from for Truck or Tractor pulling, Mud Racing, Hill Climb, turbo applications and more!
Chambers: ( NA Engines = 100cc) ( Nitrous Engines = 114cc)
Intake Valve Dia: 2.690”
Intake Port volume: NA
Intake Port Dim: 2.200”x 2.800”
Exh Valve Dia.: 2.030”
Exh Port volume: NA
Exhaust Port Dim: (NA = 2.140 dia) ( Nitrous = 2.300 dia.)
Flow, Intake: (F/P std) 650+ cfm @ 1.000” lift / 28”
Flow, Exhaust: (F/P std) 380+ cfm @ 1.000 lift / 28”