KB Hypereutectic Piston - 4.170 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 28.00 cc - Ford FE-Series (Set of 8) H77803F From the one-piece sealed housing

From the one-piece sealed housing with a built-in sight window

Cap is 50" wide overall

Rubber O ring

Type 304 Stainless braid

Thrust Bearing

KB Hypereutectic Piston - 4.170 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 28.00 cc - Ford FE-Series (Set of 8) H77803F From the one-piece sealed housingProduct Description: Piston KB Series Hypereutectic 4. 170 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Minus 28. 00 cc Ford FE Series Set of 8 Created from a high silicon aluminum alloy, KB Performance pistons are lightweight to improve throttle response and RPM changes while still being strong enough to withstand high compression and high temperatures. Each piston is engineered with race ready features like high upper compression ring locations, gas