TwinPower 3.5-Inch Bore 84-91 Evolution Big Twin Top End Gasket Kit 043158

Top End Kits include all necessary gaskets needed when performing a top end repair or replacment.

• Ideal for top-end rebuilds, performance upgrades, or routine refreshes across multiple Harley engine platforms
• Application specific kits matched to bore size, engine family, and compression/head gasket thickness
• Provide the primary gaskets and seals from the base gasket up through the rocker boxes
• Made in USA

The TwinPower 043158 Top End Gasket Kit is designed for 1984–1991 Evolution Big Twin engine top-end repairs, rebuilds, performance upgrades, and routine refreshes. This application-specific kit is matched to a 3.5-inch bore and replaces Harley-Davidson part number 17033-83B.

The kit provides the primary gaskets and seals needed from the base gasket through the rocker boxes, helping support a complete top-end service. It is suitable for the 1990 Harley-Davidson FLHS Electra Glide Sport, FLHTC Electra Glide Classic, FLHTCU Electra Glide Ultra Classic, FLST Heritage Softail, FLSTC Heritage Softail Classic, FLSTF Fat Boy, FXRS-Conv Low Rider Sport Convertible, FXRT Sport Glide, FXST Softail Standard, and FXSTS Springer Softail.

Manufactured in the USA, the TwinPower 043158 kit is an application-specific gasket solution for compatible Evolution Big Twin engines. Manufacturer part number: 043158. Vendor replacement part number: Harley-Davidson 17033-83B.

Features:

• Brand: TwinPower
• Model: 84-91 Evolution Big Twin Top End Gasket Kit
• Size: 3.5-inch bore
• Manufacturer part number: 043158
• Vendor replacement part number: Harley-Davidson 17033-83B
• Application: Top-end repairs, rebuilds, performance upgrades, and routine refreshes
• Coverage: Primary gaskets and seals from the base gasket through the rocker boxes
• Fitment: 1990 Harley-Davidson FLHS, FLHTC, FLHTCU, FLST, FLSTC, FLSTF, FXRS-Conv, FXRT, FXST, and FXSTS models listed
• Manufactured in the USA

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1
Fitment:
1984 Harley Davidson FLHS Electra Glide Sport Base
1984 Harley Davidson FLHTC Electra Glide Classic Base
1984 Harley Davidson FXR Super Glide II Base
1984 Harley Davidson FXRDG Disc Glide Base
1984 Harley Davidson FXRS Low Glide Base
1984 Harley Davidson FXRT Sport Glide Base
1984 Harley Davidson FXST Softail Standard Base
1984 Harley Davidson FXWG Wide Glide Base
1985 Harley Davidson FLHTC Electra Glide Classic Base
1985 Harley Davidson FXR Super Glide II Base
1985 Harley Davidson FXRC Low Rider Chrome Base
1985 Harley Davidson FXRS Low Glide Base
1985 Harley Davidson FXRT Sport Glide Base
1985 Harley Davidson FXST Softail Standard Base
1985 Harley Davidson FXWG Wide Glide Base
1985 Harley-Davidson FXRPF Police Base
1986 Harley Davidson FLHT Electra Glide Standard Base
1986 Harley Davidson FLHTC Electra Glide Classic Base
1986 Harley Davidson FLST Heritage Softail Base
1986 Harley Davidson FXR Super Glide II Base
1986 Harley Davidson FXRC Low Rider Chrome Base
1986 Harley Davidson FXRD Sport Glide Grand Touring Base
1986 Harley Davidson FXRS Low Glide Base
1986 Harley Davidson FXRS-SP Low Rider Sport Base
1986 Harley Davidson FXRT Sport Glide Base
1986 Harley Davidson FXST Softail Standard Base
1986 Harley Davidson FXSTC Softail Custom Base
1986 Harley Davidson FXWG Wide Glide Base
1986 Harley-Davidson FXRPF Police Base
1987 Harley Davidson FLHS Electra Glide Sport Base
1987 Harley Davidson FLHT Electra Glide Standard Base
1987 Harley Davidson FLHTC Electra Glide Classic Base
1987 Harley Davidson FLST Heritage Softail Base
1987 Harley Davidson FXR Super Glide II Base
1987 Harley Davidson FXRC Low Rider Chrome Base
1987 Harley Davidson FXRS Low Glide Base
1987 Harley Davidson FXRS-SP Low Rider Sport Base
1987 Harley Davidson FXRT Sport Glide Base
1987 Harley Davidson FXST Softail Standard Base
1987 Harley Davidson FXSTC Softail Custom Base
1987 Harley-Davidson FXRPF Police Base
1988 Harley Davidson FLHS Electra Glide Sport Base
1988 Harley Davidson FLHT Electra Glide Standard Base
1988 Harley Davidson FLHTC Electra Glide Classic Base
1988 Harley Davidson FLST Heritage Softail Base
1988 Harley Davidson FLSTC Heritage Softail Classic Base
1988 Harley Davidson FXR Super Glide II Base
1988 Harley Davidson FXRS Low Glide Base
1988 Harley Davidson FXRS-SP Low Rider Sport Base
1988 Harley Davidson FXRT Sport Glide Base
1988 Harley Davidson FXST Softail Standard Base
1988 Harley Davidson FXSTC Softail Custom Base
1988 Harley Davidson FXSTS Springer Softail Base
1988 Harley-Davidson FXRPF Police Base
1989 Harley Davidson FLHS Electra Glide Sport Base
1989 Harley Davidson FLHT Electra Glide Standard Base
1989 Harley Davidson FLHTC Electra Glide Classic Base
1989 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
1989 Harley Davidson FLST Heritage Softail Base
1989 Harley Davidson FLSTC Heritage Softail Classic Base
1989 Harley Davidson FXR Super Glide II Base
1989 Harley Davidson FXRS Low Glide Base
1989 Harley Davidson FXRS-SP Low Rider Sport Base
1989 Harley Davidson FXRT Sport Glide Base
1989 Harley Davidson FXST Softail Standard Base
1989 Harley Davidson FXSTC Softail Custom Base
1989 Harley Davidson FXSTS Springer Softail Base
1989 Harley-Davidson FXRPF Police Base
1990 Harley Davidson FLHS Electra Glide Sport Base
1990 Harley Davidson FLHT Electra Glide Standard Base
1990 Harley Davidson FLHTC Electra Glide Classic Base
1990 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
1990 Harley Davidson FLST Heritage Softail Base
1990 Harley Davidson FLSTC Heritage Softail Classic Base
1990 Harley Davidson FLSTF Fat Boy Base
1990 Harley Davidson FXR Super Glide II Base
1990 Harley Davidson FXRS Low Glide Base
1990 Harley Davidson FXRS-Conv Low Rider Sport Convertible Base
1990 Harley Davidson FXRS-SP Low Rider Sport Base
1990 Harley Davidson FXRT Sport Glide Base
1990 Harley Davidson FXST Softail Standard Base
1990 Harley Davidson FXSTC Softail Custom Base
1990 Harley Davidson FXSTS Springer Softail Base
1990 Harley-Davidson FXRPF Police Base
1991 Harley Davidson FLHS Electra Glide Sport Base
1991 Harley Davidson FLHT Electra Glide Standard Base
1991 Harley Davidson FLHTC Electra Glide Classic Base
1991 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
1991 Harley Davidson FLSTC Heritage Softail Classic Base
1991 Harley Davidson FLSTF Fat Boy Base
1991 Harley Davidson FXR Super Glide II Base
1991 Harley Davidson FXRS Low Glide Base
1991 Harley Davidson FXRS-Conv Low Rider Sport Convertible Base
1991 Harley Davidson FXRS-SP Low Rider Sport Base
1991 Harley Davidson FXRT Sport Glide Base
1991 Harley Davidson FXST Softail Standard Base
1991 Harley Davidson FXSTC Softail Custom Base
1991 Harley Davidson FXSTS Springer Softail Base
1991 Harley-Davidson FXRPF Police Base