S&S, SuperStock Evo cyl. head kit. Polished - 84-99 Evo B.T. (NU) 511426 F Sportster - Clutch (early)

F Sportster - Clutch (early)

Piston weight 335gr

Largest diameter 20

WASHER & SPRING

dimensions: 29

S&S, SuperStock Evo cyl. head kit. Polished - 84-99 Evo B.T. (NU) 511426 F Sportster - Clutch (early)Polished finish. Bolt on with stock style flat top pistons. 82cc low compression heads for approx. 8. 4: 1 (80"), 8. 9: 1 (89"), 9. 5: 1 (96") compression ratios. The port design allows these heads to outflow stock heads by a wide margin. This set up can be used with up to . 585" lift with TDC lifts of . 252" intake and . 210" exhaust. All heads can be decked . 060" to increase compression but extra care must be taken when assembling decked heads to