Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.4 cc Micro / Mini Sprint Suspension (NOT Compatible with Hydraulic Roller

(NOT Compatible with Hydraulic Roller Camshafts) Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat

270 Stepper Motor

BBK EXHAUST IS BUILT WITH CNC MANDREL BENT 1-3/4 TUBING FOR 35% INCREASED FLOW OVER STOCK TO INCREASE HORSEPOWER

Reduce Buildup In Crankcase

Flapper mounts under 12-bolt bail handle fuel caps

Speed Pro Speed Pro Piston Forged 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.4 cc Micro / Mini Sprint Suspension (NOT Compatible with Hydraulic RollerFully updated skirt profiles Exclusive DUROSHIELD skirt coating. DUROSHIELD provides scuff resistance, reduced bore clearances and enhanced ring sealing. SPEED PRO POWERFORGED pistons are built to stringent specifications with a precision CNC machined dome and skirts and microfinished ring grooves. The manufacturing process ensures that piston weights within a boxed set will not vary more than 4 grams and that skirt sizes are matched to within 0.