S&S Cycle 4in Bore Power Pack — Fits 1999-2006 Harley-Davidson Big Twin (Wrinkle Black)

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Sale price$3,396.95 Regular price$3,467.95
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About S&S Cycle

S&S Cycle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full S&S Cycle lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

S&S Cycle 4in Bore Power Pack for 1999-2006 Harley-Davidson Big Twin

Experience a significant performance upgrade with the S&S Cycle 4-inch Bore Power Pack, designed for 1999-2006 Harley-Davidson Big Twin engines. This premium kit increases your engine's displacement, delivering substantial gains in horsepower and torque. The Wrinkle Black finish adds a custom, aggressive look to your motorcycle's powerplant.

Key Features and Benefits:

  • 4-Inch Bore Cylinders: Maximizes engine displacement for impressive power and torque increases.
  • Wrinkle Black Finish: Offers a durable, high-quality custom appearance that complements any build.
  • Comprehensive Kit: Includes high-performance pistons, cylinders, and necessary gaskets for a complete engine enhancement.
  • Exceptional Performance Gains: Feel the difference with improved acceleration and increased pulling power.
  • S&S Cycle Engineering: Benefit from the precision manufacturing and proven reliability of S&S Cycle components.
  • Designed for 1999-2006 Big Twins: Ensures proper fitment for a wide range of Harley-Davidson models.

The S&S Cycle 4in Bore Power Pack is the ideal choice for riders looking to push the limits of their Twin Cam engine. This kit provides the foundation for a high-performance build, offering a thrilling ride with enhanced responsiveness and power. The Wrinkle Black finish is a popular choice for custom builds, providing a deep, lasting color.

For optimal results and engine longevity, professional installation is recommended. This power pack represents a significant investment in your motorcycle's performance and is backed by the quality assurance of S&S Cycle.

Upgrade your ride with the S&S Cycle 4in Bore Power Pack in Wrinkle Black, available now at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2006 Harley-Davidson FLHR Road King Base
1999-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2004-2006 Harley-Davidson FLHRS Road King Custom Base
1999-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
1999-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2006 Harley-Davidson FLST Heritage Softail Base
1999-2006 Harley-Davidson FLSTC Heritage Softail Classic Base
1999-2006 Harley-Davidson FLSTF Fat Boy Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
1999-2006 Harley-Davidson FLTR Road Glide Base
1999-2006 Harley-Davidson FLTRI Road Glide Base
1999-2006 Harley-Davidson FXD Dyna Super Glide Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2006 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
1999-2006 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
2000-2006 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
1999-2006 Harley-Davidson FXSTS Springer Softail Base
2001-2006 Harley-Davidson FXSTSI Springer Softail Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About S&S Cycle

S&S Cycle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full S&S Cycle lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

S&S Cycle 4in Bore Power Pack for 1999-2006 Harley-Davidson Big Twin

Experience a significant performance upgrade with the S&S Cycle 4-inch Bore Power Pack, designed for 1999-2006 Harley-Davidson Big Twin engines. This premium kit increases your engine's displacement, delivering substantial gains in horsepower and torque. The Wrinkle Black finish adds a custom, aggressive look to your motorcycle's powerplant.

Key Features and Benefits:

  • 4-Inch Bore Cylinders: Maximizes engine displacement for impressive power and torque increases.
  • Wrinkle Black Finish: Offers a durable, high-quality custom appearance that complements any build.
  • Comprehensive Kit: Includes high-performance pistons, cylinders, and necessary gaskets for a complete engine enhancement.
  • Exceptional Performance Gains: Feel the difference with improved acceleration and increased pulling power.
  • S&S Cycle Engineering: Benefit from the precision manufacturing and proven reliability of S&S Cycle components.
  • Designed for 1999-2006 Big Twins: Ensures proper fitment for a wide range of Harley-Davidson models.

The S&S Cycle 4in Bore Power Pack is the ideal choice for riders looking to push the limits of their Twin Cam engine. This kit provides the foundation for a high-performance build, offering a thrilling ride with enhanced responsiveness and power. The Wrinkle Black finish is a popular choice for custom builds, providing a deep, lasting color.

For optimal results and engine longevity, professional installation is recommended. This power pack represents a significant investment in your motorcycle's performance and is backed by the quality assurance of S&S Cycle.

Upgrade your ride with the S&S Cycle 4in Bore Power Pack in Wrinkle Black, available now at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2006 Harley-Davidson FLHR Road King Base
1999-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2004-2006 Harley-Davidson FLHRS Road King Custom Base
1999-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
1999-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2006 Harley-Davidson FLST Heritage Softail Base
1999-2006 Harley-Davidson FLSTC Heritage Softail Classic Base
1999-2006 Harley-Davidson FLSTF Fat Boy Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
1999-2006 Harley-Davidson FLTR Road Glide Base
1999-2006 Harley-Davidson FLTRI Road Glide Base
1999-2006 Harley-Davidson FXD Dyna Super Glide Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2006 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
1999-2006 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
2000-2006 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
1999-2006 Harley-Davidson FXSTS Springer Softail Base
2001-2006 Harley-Davidson FXSTSI Springer Softail Base

Product Details

Product Description

About S&S Cycle

S&S Cycle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full S&S Cycle lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

S&S Cycle 4in Bore Power Pack for 1999-2006 Harley-Davidson Big Twin

Experience a significant performance upgrade with the S&S Cycle 4-inch Bore Power Pack, designed for 1999-2006 Harley-Davidson Big Twin engines. This premium kit increases your engine's displacement, delivering substantial gains in horsepower and torque. The Wrinkle Black finish adds a custom, aggressive look to your motorcycle's powerplant.

Key Features and Benefits:

  • 4-Inch Bore Cylinders: Maximizes engine displacement for impressive power and torque increases.
  • Wrinkle Black Finish: Offers a durable, high-quality custom appearance that complements any build.
  • Comprehensive Kit: Includes high-performance pistons, cylinders, and necessary gaskets for a complete engine enhancement.
  • Exceptional Performance Gains: Feel the difference with improved acceleration and increased pulling power.
  • S&S Cycle Engineering: Benefit from the precision manufacturing and proven reliability of S&S Cycle components.
  • Designed for 1999-2006 Big Twins: Ensures proper fitment for a wide range of Harley-Davidson models.

The S&S Cycle 4in Bore Power Pack is the ideal choice for riders looking to push the limits of their Twin Cam engine. This kit provides the foundation for a high-performance build, offering a thrilling ride with enhanced responsiveness and power. The Wrinkle Black finish is a popular choice for custom builds, providing a deep, lasting color.

For optimal results and engine longevity, professional installation is recommended. This power pack represents a significant investment in your motorcycle's performance and is backed by the quality assurance of S&S Cycle.

Upgrade your ride with the S&S Cycle 4in Bore Power Pack in Wrinkle Black, available now at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2006 Harley-Davidson FLHR Road King Base
1999-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2004-2006 Harley-Davidson FLHRS Road King Custom Base
1999-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
1999-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2006 Harley-Davidson FLST Heritage Softail Base
1999-2006 Harley-Davidson FLSTC Heritage Softail Classic Base
1999-2006 Harley-Davidson FLSTF Fat Boy Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
1999-2006 Harley-Davidson FLTR Road Glide Base
1999-2006 Harley-Davidson FLTRI Road Glide Base
1999-2006 Harley-Davidson FXD Dyna Super Glide Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2006 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
1999-2006 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
2000-2006 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
1999-2006 Harley-Davidson FXSTS Springer Softail Base
2001-2006 Harley-Davidson FXSTSI Springer Softail Base

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