Skip to product information
S&S Cycle 1984-1999 BT w/ Stock Heads 88in 3 5/8in Big Bore Cylinder & Piston Kit - Wrinkle Black - 91-7502


S&S Cycle 1984-1999 BT w/ Stock Heads 88in 3 5/8in Big Bore Cylinder & Piston Kit - Wrinkle Black - 91-7502


$1,544.95
Factory order No charge now

Send us a request for this part. We will contact you to confirm ETA before payment or placing the factory/supplier order.

P4M+ rewards 7725 P4M+ points with this product. Plus automatic entry in our monthly giveaway. Nothing else to do.
5 pts / $1
Factory order Request from supplier Not in local stock. We confirm ETA before payment.
Fitment Confirm compatibility Use title, description, or ask us before ordering
Manufacturer part number ssc91-7502 S&S Cycle
Shipping Factory-order timing Takes longer than an in-stock product; we confirm ETA first
Parts-counter style support, online. Questions about fitment, ETA, or returns can be checked before ordering, and P4M stays responsible for order support after checkout.
Trustpilot Customer reviews Read current public feedback

This 3-5/8" big bore kit will increase the displacement of stock 80" Evolution big twin engines to 88" using the stock 4-1/4" flywheels. The kit includes S&S 3-5/8" borecylinders, 3-5/8" bore flat topped forged pistons with rings and wristpins, head gaskets, base gaskets, exhcaust gaskets, and instructions. The cylinders are shorter than stock, so shorter pushrods, and shorter manifold will be needed to complete the engine. Stock cases will need to be bored out to 3 5/8".

Fitment and application

S&S Cycle 1984-1999 BT w/ Stock Heads 88in 3 5/8in Big Bore Cylinder & Piston Kit - Wrinkle Black. Confirm the vehicle, year, model, configuration, and complete manufacturer part number before ordering.

Product details

  • Brand: S&S Cycle
  • Product type: Piston Sets - Powersports
  • Manufacturer part number: 91-7502
  • SKU: ssc91-7502
  • UPC: 91-7502

Description

S&S Cycle 1984-1999 BT w/ Stock Heads 88in 3 5/8in Big Bore Cylinder & Piston Kit - Wrinkle Black - 91-7502

This 3-5/8" big bore kit will increase the displacement of stock 80" Evolution big twin engines to 88" using the stock 4-1/4" flywheels. The kit includes S&S 3-5/8" borecylinders, 3-5/8" bore flat topped forged pistons with rings and wristpins, head gaskets, base gaskets, exhcaust gaskets, and instructions. The cylinders are shorter than stock, so shorter pushrods, and shorter manifold will be needed to complete the engine. Stock cases will need to be bored out to 3 5/8".

Fitment and application

S&S Cycle 1984-1999 BT w/ Stock Heads 88in 3 5/8in Big Bore Cylinder & Piston Kit - Wrinkle Black. Confirm the vehicle, year, model, configuration, and complete manufacturer part number before ordering.

Product details

  • Brand: S&S Cycle
  • Product type: Piston Sets - Powersports
  • Manufacturer part number: 91-7502
  • SKU: ssc91-7502
  • UPC: 91-7502

You may also like