KB Performance, 1340cc Evo B.T. piston kit. +.005" - 84-99 1340cc Evo B.T. (NU) 943648 our vent and return fittings

our vent and return fittings have furnace-brazed tubing

Designed to fit OEM style valve seals

Used to easily remove and install the wire type wristpin clips without hassle

The grips are finished off with 6061 billet aluminum end caps and collars

KB Performance, 1340cc Evo B.T. piston kit. +.005" - 84-99 1340cc Evo B.T. (NU) 943648 our vent and return fittings8. 5: 1 CR. Piston weight 350gr. Piston pin weight 97gr. Head type: Flat top. Dome +1. 5cc. Compression height 1. 375". Bore 3. 4980". Stroke 4. 250" (4 1 4"). Rod length 7. 440". Cyl. length 5. 550". Comes with T6 heat treated 390 Hypereutectic cast pistons with 16% silicone levels which enables running a very tight clearance for longevity and hardly any piston noise. Note: Top compression ring will need additional clearance. See instructions.