Product Details

This forged 3-5/8" bore stroker piston replaces several cast and forged big bore pistons that S&S previously offered. Applications for this piston include 88" (4-1/4" stroke), 93" (4-1/2" stroke), and 96" (4-5/8" stroke) engines with stock 8-1/2" diameter flywheels, and 98" (4-3/4" stroke) and 103" (5" stroke) engines with 8-1/4" small diameter flywheels. As with the stock bore stroker piston, the modern metallurgy and advanced skirt profiles allow a relatively close piston fit for low engine noise and long engine life.

Displacement: 88"

• Stroke: 4-1/4"
• Flywheel Diameter: 8-1/2"
• Compression Ratio: 8.5:1
• Cylinder Length (SH and P series engines): 5.330"

Displacement: 93"

• Stroke: 4-1/2"
• Flywheel Diameter: 8-1/2"
• Compression Ratio: 8.5:1
• Cylinder Length (SH and P series engines): 5.405"
• Cylinder Length (KN series engines): 5.625"

Displacement: 93 (High Compression)

• Stroke: 4-1/2"
• Flywheel Diameter: 8-1/2"
• Compression Ratio: 9.1:1
• Cylinder Length (SH and P series engines): 5.363"

Displacement: 96"

• Stroke: 4-5/8"
• Flywheel Diameter: 8-1/2"
• Compression Ratio: 9.1:1
• Cylinder Length (SH and P series engines): 5.440"

Displacement: 98"

• Stroke: 4-3/4"
• Flywheel Diameter: 8-1/4"
• Compression Ratio: 8.9:1
• Cylinder Length (SH and P series engines): 5.530"

Displacement: 103"

• Stroke: 5"
• Flywheel Diameter: 8-1/4"
• Compression Ratio: 9.7:1
• Cylinder Length (SH and P series engines): 5.630"

NOTE: Only for models with OVH (Overhead Valve) engines.

Fit Guide

Model

Piston Set

Bore

3-5/8"

Piston Type

Forged

Size Over Standard

Stock

Product Fitment

This item fits the following applications: