KB Hypereutectic Dome Pistons - SB Ford 302 - 5.090" Rod Length, .030" Over Bore Size H778C44M 2 to 4 in Lift

2 to 4 in Lift

1975-1991 Mercury Grand Marquis

Extreme Series

125"PARTS INCLUDED-(1) Pro6 Single lighting system-Mounting Hardware-Complete Plug-N-Play Wiring Harness with 30 amp LED Switch

Thick Above Tank Surface

KB Hypereutectic Dome Pistons - SB Ford 302 - 5.090" Rod Length, .030" Over Bore Size H778C44M 2 to 4 in LiftModern piston design locates the top ring higher for improved performance. a high top ring operates at higher temperatures and requires a larger top ring end gap. To find the proper ring end gap, multiply your bore size by the ring end gap factor listed on the chart (i. e. , Street Normally Aspirated 4. 000" bore x . 0065" gap factor = . 026" total top ring end gap). Your hypereutectic performance piston will expand less than typical cast or forged