Twin Power Evolution Big Twin Top End Gasket Kit - 3.5 Inch Bore

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SKU: TWP043158
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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 TwinPower

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

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Twin Power Evolution Big Twin Top End Gasket Kit

Ensure peak performance and reliability for your Harley-Davidson Evolution Big Twin engine with this premium Top End Gasket Kit from Twin Power. Engineered to meet or exceed OEM specifications, this kit is designed for 1984-1991 models featuring a 3.5-inch bore, directly replacing Harley-Davidson part number 17033-83B.

Engineered for Performance and Durability:

  • Brand: Twin Power
  • Engine Type: Evolution Big Twin
  • Bore Size: 3.5 Inches
  • Replaces: Harley-Davidson 17033-83B
  • Compatibility: Fits a wide range of 1984-1991 Harley-Davidson models including FLHS, FLHTC, FLHTCU, FLST, FLSTC, FLSTF, FXR, FXRC, FXRD, FXRDG, FXRPF, FXRS, FXRS-SP, FXRT, FXST, FXSTC, and FXWG.
  • Components: High-quality gaskets designed for a precise fit and superior sealing.
  • Application: Ideal for engine rebuilds, top-end repairs, or performance upgrades.

This comprehensive kit provides all the necessary gaskets to properly seal your Evolution Big Twin's top end, preventing leaks and ensuring optimal compression. Whether you're performing routine maintenance or a complete engine overhaul, Twin Power gaskets offer the quality and consistency you need for a lasting repair. Trust Twin Power for dependable engine components that keep your ride running strong.

Upgrade your Harley-Davidson's engine with the reliability and performance of Twin Power. Find this essential Top End Gasket Kit and other quality parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1991 Harley-Davidson FLHS Electra Glide Sport Base
1984-1990 Harley-Davidson FLHTC Electra Glide Classic Base
1989-1991 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1988-1991 Harley-Davidson FLSTC Heritage Softail Classic Base
1990-1991 Harley-Davidson FLSTF Fat Boy Base
1984-1991 Harley-Davidson FXR Super Glide II Base
1985-1987 Harley-Davidson FXRC Low Rider Chrome Base
1984 Harley-Davidson FXRDG Disc Glide Base
1985-1991 Harley-Davidson FXRPF Police Base
1984-1991 Harley-Davidson FXRS Low Glide Base
1990-1991 Harley-Davidson FXRS-Conv Low Rider Sport Convertible Base
1984-1991 Harley-Davidson FXST Softail Standard Base
1988-1991 Harley-Davidson FXSTS Springer Softail Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About TwinPower

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

Watch in action

Twin Power Evolution Big Twin Top End Gasket Kit

Ensure peak performance and reliability for your Harley-Davidson Evolution Big Twin engine with this premium Top End Gasket Kit from Twin Power. Engineered to meet or exceed OEM specifications, this kit is designed for 1984-1991 models featuring a 3.5-inch bore, directly replacing Harley-Davidson part number 17033-83B.

Engineered for Performance and Durability:

  • Brand: Twin Power
  • Engine Type: Evolution Big Twin
  • Bore Size: 3.5 Inches
  • Replaces: Harley-Davidson 17033-83B
  • Compatibility: Fits a wide range of 1984-1991 Harley-Davidson models including FLHS, FLHTC, FLHTCU, FLST, FLSTC, FLSTF, FXR, FXRC, FXRD, FXRDG, FXRPF, FXRS, FXRS-SP, FXRT, FXST, FXSTC, and FXWG.
  • Components: High-quality gaskets designed for a precise fit and superior sealing.
  • Application: Ideal for engine rebuilds, top-end repairs, or performance upgrades.

This comprehensive kit provides all the necessary gaskets to properly seal your Evolution Big Twin's top end, preventing leaks and ensuring optimal compression. Whether you're performing routine maintenance or a complete engine overhaul, Twin Power gaskets offer the quality and consistency you need for a lasting repair. Trust Twin Power for dependable engine components that keep your ride running strong.

Upgrade your Harley-Davidson's engine with the reliability and performance of Twin Power. Find this essential Top End Gasket Kit and other quality parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1991 Harley-Davidson FLHS Electra Glide Sport Base
1984-1990 Harley-Davidson FLHTC Electra Glide Classic Base
1989-1991 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1988-1991 Harley-Davidson FLSTC Heritage Softail Classic Base
1990-1991 Harley-Davidson FLSTF Fat Boy Base
1984-1991 Harley-Davidson FXR Super Glide II Base
1985-1987 Harley-Davidson FXRC Low Rider Chrome Base
1984 Harley-Davidson FXRDG Disc Glide Base
1985-1991 Harley-Davidson FXRPF Police Base
1984-1991 Harley-Davidson FXRS Low Glide Base
1990-1991 Harley-Davidson FXRS-Conv Low Rider Sport Convertible Base
1984-1991 Harley-Davidson FXST Softail Standard Base
1988-1991 Harley-Davidson FXSTS Springer Softail Base

Product Details

Product Description

About TwinPower

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

Watch in action

Twin Power Evolution Big Twin Top End Gasket Kit

Ensure peak performance and reliability for your Harley-Davidson Evolution Big Twin engine with this premium Top End Gasket Kit from Twin Power. Engineered to meet or exceed OEM specifications, this kit is designed for 1984-1991 models featuring a 3.5-inch bore, directly replacing Harley-Davidson part number 17033-83B.

Engineered for Performance and Durability:

  • Brand: Twin Power
  • Engine Type: Evolution Big Twin
  • Bore Size: 3.5 Inches
  • Replaces: Harley-Davidson 17033-83B
  • Compatibility: Fits a wide range of 1984-1991 Harley-Davidson models including FLHS, FLHTC, FLHTCU, FLST, FLSTC, FLSTF, FXR, FXRC, FXRD, FXRDG, FXRPF, FXRS, FXRS-SP, FXRT, FXST, FXSTC, and FXWG.
  • Components: High-quality gaskets designed for a precise fit and superior sealing.
  • Application: Ideal for engine rebuilds, top-end repairs, or performance upgrades.

This comprehensive kit provides all the necessary gaskets to properly seal your Evolution Big Twin's top end, preventing leaks and ensuring optimal compression. Whether you're performing routine maintenance or a complete engine overhaul, Twin Power gaskets offer the quality and consistency you need for a lasting repair. Trust Twin Power for dependable engine components that keep your ride running strong.

Upgrade your Harley-Davidson's engine with the reliability and performance of Twin Power. Find this essential Top End Gasket Kit and other quality parts at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1991 Harley-Davidson FLHS Electra Glide Sport Base
1984-1990 Harley-Davidson FLHTC Electra Glide Classic Base
1989-1991 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1988-1991 Harley-Davidson FLSTC Heritage Softail Classic Base
1990-1991 Harley-Davidson FLSTF Fat Boy Base
1984-1991 Harley-Davidson FXR Super Glide II Base
1985-1987 Harley-Davidson FXRC Low Rider Chrome Base
1984 Harley-Davidson FXRDG Disc Glide Base
1985-1991 Harley-Davidson FXRPF Police Base
1984-1991 Harley-Davidson FXRS Low Glide Base
1990-1991 Harley-Davidson FXRS-Conv Low Rider Sport Convertible Base
1984-1991 Harley-Davidson FXST Softail Standard Base
1988-1991 Harley-Davidson FXSTS Springer Softail Base

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