Free shipping to the Contiguous United States on orders over $69.99

Book your on-site cam install! Slots are limited.

Sold out

S&S CYCLE 0903-1257 91-7660 96" Sidewinder® Engine Performance Kit 96" Sidewinder® - 3.625" Big Bore - Stroker Kit - Natural - Evolution Big Twin

S&S CYCLE  |  SKU: 0903-1257
Regular price $2,879.95
Shipping calculated at checkout.

Features

  • Kit includes standard flywheel assembly, 3.625" Sidewinder® stroker big bore cylinder, 9.75:1 compression ratio pistons, rings and gaskets
  • Flywheel assembly is complete with S&S heavy duty connecting rods and mainshafts, head gaskets, base gaskets, and exhaust gaskets
  • Makes stock 80" displacement into 96" displacement
  • Made In the USA
  • Does not include manifold, pushrods, or pushrod clips.
  • '77-'89 style pinion gear and oil pump drive gears must be used when installing S&S flywheels in '90-'99 engines.
  • Cases must be bored to accept 3.625" bore cylinders, and a minor crankcase clearancing operation for the crankpin nut must be performed.

Specs

Type Engine
Stroke Length 4.625"
Units Kit
Style Big Bore
Bore Size 3.625"
Displacement 96"
Model Sidewinder
Product Name Performance Kit
Riding Style Street
Color/Finish Natural
Compression Ratio 9.75:1

1984 Harley-Davidson Disc Glide FXRDG
1984-1998 Harley-Davidson Electra Glide Classic FLHTC
1984-1988,1991-1992 Harley-Davidson Low Glide FXRS
1984-1993 Harley-Davidson Softail Standard FXST
1984-1993 Harley-Davidson Sport Glide FXRT
1984-1994 Harley-Davidson Tour Glide Classic FLTC
1985 Harley-Davidson 1200 Fat Bob FXEF
1985-1987,1995-1998 Harley-Davidson Electra Glide Standard FLHT
1985,1987 Harley-Davidson Low Rider Chrome FXRC
1985 Harley-Davidson Low Rider FXSB
1985-1986 Harley-Davidson Wide Glide FXWG
1986-1999 Harley-Davidson Softail Custom FXSTC
1986-1990 Harley-Davidson Softail Heritage FLST
1986 Harley-Davidson Sport Glide Grand Touring FXRD
1986-1994 Harley-Davidson Super Glide II FXR
1987-1993 Harley-Davidson Electra Glide Sport FLHS
1987-1994 Harley-Davidson Low Rider Custom FXLR
1987-1999 Harley-Davidson Softail Heritage Classic FLSTC
1988-1993 Harley-Davidson Low Rider Sport FXRS-SP
1988-1999 Harley-Davidson Softail Springer FXSTS
1989-1998 Harley-Davidson Electra Glide Ultra Classic FLHTCU
1989-1990,1993 Harley-Davidson Low Rider FXRS
1989-1996 Harley-Davidson Tour Glide Ultra Classic FLTCU
1990-1993 Harley-Davidson Low Rider Convertible FXRS-CONV
1990-1999 Harley-Davidson Softail Fat Boy FLSTF
1992 Harley-Davidson Dyna Glide Daytona FXDB-D
1992 Harley-Davidson Super Glide Custom FXDC
1993-1998 Harley-Davidson Dyna Low Rider FXDL
1993-1998 Harley-Davidson Dyna Wide Glide FXDWG
1993 Harley-Davidson Softail Heritage Nostalgia FLSTN
1994-1998 Harley-Davidson Road King FLHR
1994-1996 Harley-Davidson Softail Heritage Special FLSTN
1995-1998 Harley-Davidson Dyna Convertible FXDS-CONV
1995-1997 Harley-Davidson Softail Bad Boy FXSTSB
1995-1998 Harley-Davidson Super Glide FXD
1997-1999 Harley-Davidson Softail Heritage Springer FLSTS
1998 Harley-Davidson Road Glide FLTR
1999 Harley-Davidson FXR2
1999 Harley-Davidson FXR3
1999 Harley-Davidson Softail Night Train FXSTB
2000 Harley-Davidson FXR4

Fitment Disclosure

This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.