Twin Power 99-17 Twin Cam Big Twin Head Gasket 3.937 Inch Bore .040 MLS Pr
Fits Harley-Davidson · 1999–2017
See all 89 models this fits
- FXDC Super Glide Custom
- FXDF Fat Bob
- FXDL Dyna Low Rider
- FXDB Street Bob
- FXD Dyna Super Glide
- FXSTB Night Train
- FXSTC Softail Custom
- FLSTC Heritage Softail Classic
- FXDWG Dyna Wide Glide
- FXSBSE CVO Breakout
- FXS Blackline
- FLSTF Fat Boy
- FLSTN Softail Deluxe
- FLSTFB Fat Boy Lo
- FLTRI Road Glide
- FLTRXSE2 CVO Road Glide Custom
- FLTRX Road Glide Custom
- FLTRU Road Glide Ultra
- FLSTSC Softail Springer Classic
- FLSTS Heritage Springer
- FLTRUSE CVO Road Glide Ultra
- FXSE CVO Pro Street Breakout
- FLHTKL Ultra Limited Low
- FLHTK Ultra Limited
- FLHTCUL Electra Glide Ultra Classic Low
- FLHTCU Electra Glide Ultra Classic
- FLHXS Street Glide Special
- FLTRXS Road Glide Special
- FLTRX Road Glide
- FLHX Street Glide
- FLHR Road King
- FLHTKSE CVO Limited
- FLHXSE CVO Street Glide
- FLRT Freewheeler
- FXSB Breakout
- FLD Switchback
- FLSTFBS Fat Boy S
- FLST Heritage Softail
- FXSTDSE Screamin Eagle Softail Deuce
- FLTR Road Glide
- FXSTS Springer Softail
- FLSTNSE CVO Softail Deluxe
- FLHRSE6 CVO Road King
- FXSTD Softail Deuce
- FLHTCUSE7 CVO Ultra Classic Electra Glide
- FLHRI Road King
- FLHTCI Electra Glide Classic
- FLHTC Electra Glide Classic
- FLHRSI Road King Custom
- FLHTCUI Electra Glide Ultra Classic
- FLHRC Road King Classic
- FLSTCI Heritage Softail Classic
- FLSTFI Fat Boy
- FLHTI Electra Glide Standard
- FLHTCUTG Tri Glide Ultra Classic
- FLHTCUSE4 CVO Ultra Classic Electra Glide
- FXCWC Rocker C
- FXCW Rocker
- FLSTSB Cross Bones
- FLHTCUSE3 Screamin Eagle Ultra Classic Electra Glide
- FXSTSSE Screamin Eagle Softail Springer
- FXDBI Street Bob
- FXDX Dyna Super Glide Sport
- FXDXT Dyna Super Glide T-Sport
- FLHRSEI2 Screamin Eagle Road King 2
- FLHRSEI Screamin Eagle Road King
- FXDWG2 CVO Dyna Wide Glide
- FXDS-Conv Dyna Convertible
- FLSTSE CVO Softail Convertible
- FLHTCUSE6 CVO Ultra Classic Electra Glide
- FLHTCUSE5 CVO Ultra Classic Electra Glide
- FXSTSSE3 CVO Softail Springer
- FXDFSE CVO Dyna Fat Bob
- FLTRSE3 CVO Road Glide
- FLHT Electra Glide Standard
- FLHRS Road King Custom
- FLHRCI Road King Classic
- FLHXXX Street Glide Trike
- FLHTCUSE8 CVO Ultra Classic Electra Glide
- FLSTSI Heritage Springer
- FXDCI Super Glide Custom
- FXSTBI Night Train
- FXDWGI Dyna Wide Glide
- FXDLI Dyna Low Rider
- FXDI Dyna Super Glide
- FLTRXSE CVO Road Glide Custom
- FXSTSI Springer Softail
- FXSTI Softail Standard
- FXSTDI Softail Deuce
Year and model taken from the manufacturer's fitment data. Not sure? Ask us with your year, make and model.
- Genuine TwinPower product, not a copy
- Authorized dealer — sourced from the manufacturer or their distributor
- Free US shipping over $150 · 90-day returns
Product details
Twin Power 99-17 Twin Cam Big Twin Head Gasket 3.937 Inch Bore .040 MLS Pr
Twin Power™ head gaskets deliver premium sealing performance, ensuring maximum compression, reliability, and durability for Harley-Davidson Big Twin and M8 engines.
| Brand | TwinPower |
|---|---|
| Category | Engine & Fuel |
| Part number | twp043179 |
| UPC | 887337317557 |
| Shipping weight | 0.23 lb |
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Free US shipping over $150
$9.95 flat rate under $150, free above it. Most orders dispatch within 1–2 business days and arrive 3–5 business days after that.
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Ships from five US warehouses
Your order leaves whichever warehouse is closest to you, which is what keeps transit times short across the country.
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Fits your bike or your money back
Wrong fit? Send it back and we refund in full. Message us your year, make and model and we will confirm before you order.
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90-day returns, no restocking fees
Return any unused item in its original packaging within 90 days of delivery.
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Authorized dealer, genuine parts
Every part is sourced directly from the manufacturer or their authorized distributor — this one from TwinPower.
Motorcycle parts are model specific and the same part often changes between model years. If you are not certain this one fits, ask us first — it takes a minute and it saves a return.
- Send the bike. Year, make, model and trim — for example “2021 Suzuki GSX-R750”.
- Send the VIN if you have it. It removes any doubt about a mid-year running change.
- We confirm before you order. A technician at the dealership checks this part against your bike. No charge, no obligation.