S&S Cycle Big Twin Piston Kit - 3.4375" Bore - Standard - 106-5503

Upgrade your vintage Big Twin with the S&S Cycle 74" Forged Piston Kit, designed for superior strength and performance. This kit delivers enhanced reliability and improved combustion efficiency for your classic engine. Experience the difference forged pistons make in your vintage Harley-Davidson's performance.

Description

The S&S Cycle Forged 74" Piston Kit is engineered to breathe new life into your stock 74" Big Twin motor. Forged from high-strength materials, these pistons offer exceptional durability and resistance to wear, making them ideal for demanding riding conditions. The kit's meticulous design ensures optimal compatibility and performance, delivering a noticeable improvement in your engine's power and responsiveness. With a 9.0:1 compression ratio, this piston kit is designed to optimize your engine's performance while ensuring reliability. Each kit is manufactured in the USA to exacting standards. Replacing your pistons with this kit will provide a longer service life for your engine.

Features & highlights

• Forged pistons provide superior strength and durability for demanding conditions.
• Designed for 74" stock Big Twin motors, ensuring a perfect fit.
• Kit includes all necessary components: pistons, rings, wristpins, and clips.
• Wrist pin deck height of 1.436" for precise fitment.
• Made in the U.S.A. with high-quality materials and manufacturing processes.
• High compression design optimizes combustion efficiency and power output.

Technical specifications

• Brand: S&S Cycle
• Displacement: 74"
• Bore Size: 3.4375"
• Compression Ratio: 9.0:1
• Piston Material: Forged
• Stroke Length: 3.969" (3-31/32")
• Type: High Compression

Important to know

This kit requires the use of connecting rods with a rod length of 7.440" (standard length OEM #24281-74A). Using earlier connecting rods with a rod length of 7.470" (OEM #24281-41A) may result in a slight increase in the compression ratio of approximately one-half point and may also lead to clearance issues. Always carefully check all piston-to-cylinder head clearances when using early-style rods.