Twin Power twp210529 65–79 Big Twin and XL Ignition Coil, Black

Twin Power™ coils are the high-quality direct fit with at least 20% more voltage than stock. Constructed from durable high-quality, molded-epoxy, in a late O.E.M.-style molded case, these ignition coils improve starting, prevent high-speed misfires and increase overall performance. They are available in black and chrome, and come with a one-year manufacturer's warranty.

• Direct replacements restore factory spark output across Big Twin, XL, V-Rod, and Softail applications from 1965-2020
• High-energy output ensures crisp throttle response, easy starting, and strong combustion under all conditions
• Black/Chrome housings match stock aesthetics with precise ohm ratings for reliable ignition performance

The Twin Power twp210529 ignition coil is a direct replacement for select Harley-Davidson Big Twin and XL applications from 1965 through 2020. Its molded-epoxy construction and late OEM-style molded case provide a durable housing for dependable ignition performance.

Designed to deliver at least 20% more voltage than stock, this high-energy coil supports easy starting, crisp throttle response, strong combustion and reduced risk of high-speed misfires. The black housing is designed to complement stock aesthetics, while the precise 5-ohm rating supports reliable ignition operation.

Key Features & Performance Benefits

• High-energy output: Delivers at least 20% more voltage than stock for strong spark performance.
• Improved starting: Supports easier starting and crisp throttle response.
• Misfire prevention: Helps prevent high-speed misfires and supports consistent combustion.
• Durable construction: Uses a molded-epoxy design in a late OEM-style molded case.

Key Product Specifications & Technical Data

• Brand: Twin Power
• Part number: twp210529
• Product type: Ignition coil
• Color: Black
• Application: Big Twin and XL
• Rated resistance: 5 ohms
• Replacement reference: H-D 31609-65A
• Manufacturer warranty: One year

What's Included

One Twin Power twp210529 black ignition coil.

Fitment

Fits 1971–1977 Harley-Davidson FX Super Glide, 1975–1976 Harley-Davidson FXE Super Glide, and 1975–1976 Harley-Davidson XLCH applications listed by the manufacturer.

Fitments:
1965 Harley Davidson XLCH Base
1966 Harley Davidson XLCH Base
1967 Harley Davidson XLCH Base
1968 Harley Davidson XLCH Base
1969 Harley Davidson XLCH Base
1970 Harley Davidson XLCH Base
1971 Harley Davidson FLH Electra Glide Base
1971 Harley Davidson FX Super Glide Base
1971 Harley Davidson XLCH Base
1972 Harley Davidson FLH Electra Glide Base
1972 Harley Davidson FX Super Glide Base
1972 Harley Davidson XLCH Base
1973 Harley Davidson FLH Electra Glide Base
1973 Harley Davidson FX Super Glide Base
1973 Harley Davidson XLCH Base
1974 Harley Davidson FLH Electra Glide Base
1974 Harley Davidson FX Super Glide Base
1974 Harley Davidson FXE Super Glide Base
1974 Harley Davidson XLCH Base
1975 Harley Davidson FLH Electra Glide Base
1975 Harley Davidson FX Super Glide Base
1975 Harley Davidson FXE Super Glide Base
1975 Harley Davidson XLCH Base
1976 Harley Davidson FLH Electra Glide Base
1976 Harley Davidson FX Super Glide Base
1976 Harley Davidson FXE Super Glide Base
1976 Harley Davidson XLCH Base
1977 Harley Davidson FLH Electra Glide Base
1977 Harley Davidson FX Super Glide Base
1977 Harley Davidson FXE Super Glide Base
1977 Harley Davidson FXS Low Rider Base
1977 Harley Davidson XLCH Base
1977 Harley Davidson XLCR Cafe Racer Base
1977 Harley Davidson XLT Base
1978 Harley Davidson FLH Electra Glide Base
1978 Harley Davidson FX Super Glide Base
1978 Harley Davidson FXE Super Glide Base
1978 Harley Davidson FXS Low Rider Base
1978 Harley Davidson XLCH Base
1978 Harley Davidson XLCR Cafe Racer Base
1978 Harley Davidson XLS Roadster Base
1978 Harley Davidson XLT Base
1979 Harley Davidson FLH Electra Glide Base
1979 Harley Davidson FXE Super Glide Base
1979 Harley Davidson FXEF Fat Bob Base
1979 Harley Davidson FXS Low Rider Base
1979 Harley Davidson XLCH Base
1979 Harley Davidson XLS Roadster Base

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Regular Stock: t
Units Per Sku: 1