JES Sportsman Series 255cc High Port Heads with Valves

JES Sportsman Series 255cc Bare High Port Cylinder Heads with Valves

Sportsman Series cylinder heads are the perfect compromise between budget and performance!

General Specs:
255cc Intake Port
95cc Exhaust Port or 102cc Pro Exhaust Port (Inline bolt pattern is plugged on Pro Port)
58cc Combustion chamber
High Density 356-T6 Aluminum casting
Spring Pockets cut to accept 1.615" OD Solid Roller Springs
Hardened Valve Seats
.530" OD Bronze Valve Guides
CNC Ported Intake and Exhaust Runners
Hand Bowl Blended
Lapped Valves

Use 3/4" Reach 5/8" Gasket Style Spark Plugs (Example NGK R5671A-9)

Standard Components Include:
Ferrea Competition Plus 2.125" x 5.300" Stainless Intake Valves 50* Seat Angle
Ferrea Competition Plus 1.600" x 5.300" Stainless Exhaust Valves 55* Seat Angle

Flow Specs with SS Valves and Pro Port:
.300" 183/146
.400" 274/190
.500" 297/222
.600" 331/240
.700" 341/249
.800" 349/257
.900" 358/259
1.00" 370/262