Ford/Mercury racing flathead dome top pistons

Application: 

Recommended for applications using nitrous (up to 250HP shot) / boost (up to 5LBS)

Includes:

Complete set of pistons, rings, locks & pins.

Specifications:

Piston top type: dome top
Bore: 3.187" to 3.375".
Stroke: 3.750" to 4.250".
Rod length: 7.000".
Compression height: 1.436" to 1.561".
Dome height: .187".
Gram weight: 289 to 356.
Rings: 3/32", 3/32". 5/32".
Ring set: R3192.
Rings included: yes.
Pin type: 5115 straight wall.
Pin diameter: .750".
Pin length: 2.770".
Pin wall: .195".
Pin weight: 120 grams.
Pin lock type: single spiral lock.