JES Sportsman Series 255cc High Port Heads with Pro Exhaust Port

JES Sportsman Series 255cc High Port Cylinder Heads with Pro Exhaust Port

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

General Specs:
255cc Intake runner
102cc Exhaust runner (Inline bolt pattern is plugged)
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
Professional assembly (If Chosen)

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

Spring Packages Include:
PAC 1325 .800" Springs, PAC R500 Series Ti-17 Retainers, PAC Ti Locks, Viton Seals, Steel Spring Seats
PAC 1330 .850" Springs, PAC R500 Series Ti-17 Retainers, PAC Ti Locks, Viton Seals, Steel Spring Seats

Flow Specs:
.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