Partial CNC Ported Heads
14° BBF
270cc Port
75cc Chambers
Stock Exh. Port Location
1.550 OD Springs

14° BBF
280cc Partial CNC ported
85cc chambers
Stk Exhaust Port Loc.
Assembled w/1.550 OD Hyd Roller Valve

14° BBF
295cc Fully CNC Ported
75cc chambers
Stk Exh
Assembled w/1.550 OD Pacaloy Solid Roller Valve Springs

14° BBF 285cc Fully CNC Ported Heads
85cc Chambers
Pr. Assm. w/1.550 Hyd. Roller Springs
Stock Exh. Port Location

315cc/75cc, Assembled, 1.550" Hydraulic Roller (.725" Max Lift)

Note: .250" raised exhaust ports.

315cc/85cc, Assembled, 1.550" Hydraulic Roller (.725" Max Lift)

Note: .250" raised exhaust ports.

315cc/75cc, Assembled, 1.625" Mechanical Roller (.850" Max Lift)

Note: .250" raised exhaust ports.

315cc/85cc, Assembled, 1.625" Mechanical Roller (.850" Max Lift)

Note: .250" raised exhaust ports.