This is all of our spread port and pro stock experience tossed
into one cylinder head. Dart made an excellent platform for
RFD to build the most powerfull spread port head available. The BEST head for Top Sportsman , Top Dragster, Truck & Tractor pull or all out Marine. This is our most powerfull standard bore spacing head for N/A applications. 1400+ hp capable.
14º version for 706" and NOS.
11x6 Intake Valve Angle
> 2.52" Intake - 1.8" Exhaust Valves
> 55cc to 76cc Chambers
>Flows 550 to 580+ cfm depending on application
> Pro-Stock Port & Valve Seat Technology
> Fits Both Cast Single 4 & Tunnel Ram Intakes
> Several port CnC Programs
> Custom Built for Your Application
> Fits 4.84" Standard Bore Space Blocks
> Sheet-Metal Intake Packages Available
Fully CnC Ported From $5,400 - bare
>RFD custom cams, cast intakes, sheet metal intakes and Billet intakes available to match.
> Copper valve seats
> Xceldyne or Ferrea Titanium valves
> Triple roller Nex-Tech valve springs
> Diamond Custom pistons to RFD spec
Shane LeJeune goes 6.69 @ 200 N/A 632" , 4.26 @ 163 with RFD 11* heads !