946488 MCS Replacement 80" Flathead piston kit. +.080" for Harley-Davidson
incl. VAT
Chapter members save 12% · Sign in for member pricing
Estimated delivery: 3–15 working days
Authorised
Iron City Dealer
14-Day Returns
Easy & hassle-free
Secure Checkout
256-bit encryption
Free UK Delivery
On orders over £100
Specifications
- Brand
- MCS
- Part Number
- 946488
- OEM Reference
- 946488
- Pack Quantity
- Sold as a set
- Category
- Pistons And Rings Kits
- VAT Rate
- 20%
About This Product
This is the MCS replacement piston kit for 1937 to 1941 80-inch 1300cc Side Valve Flathead engines. This is the plus .080 inch oversize set for a stock rebuild. The kit contains cast aluminium pistons, wrist pins, retainers, and rings. Sold as a set. Replaces OEM 946488. It is vital that a skilled mechanic handles the installation. Ensure all components are compatible and clearances are spot on. Follow a traditional break-in procedure.
Manufacturer part number: 946488.
Fitment
2 models37-41 80" (1300cc) 3-7/16" bore Flatheads
Flathead 2 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1937–1941 | Flathead UH-1300 |
| Harley-Davidson | 1937–1941 | Flathead ULH-1300 |
Planning other changes? Find your model in the bike customiser.
Related Products
View all →
Wiseco
883 to 1200 XL conversion piston kit. +.010"
Wiseco
883 to 1200 XL conversion piston kit. +.030"
S&S
Replacement Evo Superstock piston kit. Std
S&S
3-5/8" repl. Evo SuperStock piston kit. +.030"
S&S
3-5/8" repl. Evo SuperStock piston kit. +.040"
S&S
3-7/16" forged stroker piston kit. +.080"
KB Performance Piston
883-1200 big bore piston kit. STD
KB Performance Piston
883-1200 big bore piston kit. +.010"
More from MCS
View all →
FLTR headlamp LED adapter harness
Transmission sprocket / pulley nut wrench
Motor mount w/coil mount. no ignition switch hole. Chrome
41-99 connecting rod roller retainer set
Throttle screw extension lever. Black
Detachable sissy bar side plates
Docking hardware kit
Docking hardware kit
Who are we? Leeds Harley-Davidson - Iron City Motorcycles
This product is fulfilled by Iron City Motorcycles, Leeds' authorised Harley-Davidson® dealer, serving the UK with a full range of Genuine Motorclothes®, dealer merchandise, and official Harley-Davidson parts & accessories — available for UK and international delivery.
From OEM Parts to retro lifestyle wear to aftermarket stockits we have what you need to keep you riding all year round.
Use our official OEM parts finder to browse our full Genuine Harley-Davidson® Parts and our associated approved aftermarket catalogues.