Wiseco 4.125 in. K2801 Black Edition HD Milwaukee 8 CVO 121ci 11:1 CR Piston

Wiseco Black Edition pistons are designed and built to be the ultimate in piston performance and durability for Harley-Davidson engines. Introducing proprietary, industry first coatings, Black Edition pistons perform as good as they look. Wiseco's ArmorX coating protects critical areas of the piston for miles and miles of riding, while ArmorFit skirt coating helps reduce engine noise and friction. Equip your performance Harley build with the American-made pistons it deserves. Wiseco Black Edition V-Twin. Piston Kit, 4.125 in. Bore, 11:1 CR

• ArmorFit skirt coating allows forged piston to be installed at tighter clearance, conforming to the cylinder bore through normal operation for ideal performance with less guesswork
• ArmorX coating applied to piston crown, ring grooves, and pin bore through proprietary electrochemical process and materials
• Greatly increased resistance to wear and damage caused by heat and detonation plus resists ring microwelding
• Various compression ratios and bore sizes available off the shelf to fit specific builds
• Ideal for high-performance environments - from natural aspiration to power adders
• Remains durable in high load, high cylinder pressure, high heat environments
• Engineered, forged, and machined in the USA in Mentor, OH
• Kits include ring packs, wrist pins, and circlips

The Wiseco Black Edition K2801 piston kit is designed for Harley-Davidson performance builds using a 4.125-inch bore and an 11:1 compression ratio. This forged piston is engineered for durability in high-load, high-cylinder-pressure, and high-heat environments, making it suitable for high-performance applications ranging from naturally aspirated engines to builds using power adders.

The piston features Wiseco ArmorFit skirt coating, which allows the forged piston to be installed at tighter clearance and conform to the cylinder bore during normal operation. This helps support performance while reducing installation guesswork, engine noise, and friction. ArmorX coating is applied to the piston crown, ring grooves, and pin bore through a proprietary electrochemical process designed to improve resistance to wear, heat, detonation damage, and ring microwelding.

Wiseco engineers, forges, and machines these pistons in the USA in Mentor, Ohio. The kit includes ring packs, wrist pins, and circlips. This piston fits select 2017 Harley-Davidson FLHXSE CVO Street Glide, FLHTKSE CVO Limited, and 2018 Harley-Davidson FLFBS Fat Boy 114, FLHCS Heritage Classic 114, FLHTKSE CVO Limited, FLHXSE CVO Street Glide, FXBRS Breakout 114, and FXFBS Fat Bob 114 models, as well as select 2019 Harley-Davidson FLFBS Fat Boy 114 and FLHCS Heritage Classic 114 models. Manufacturer part number: K2801. Vendor part number: K2801.

Features:

• Bore and compression ratio: 4.125-inch bore with an 11:1 compression ratio
• ArmorFit skirt coating: Supports tighter installation clearance while helping reduce engine noise and friction
• ArmorX coating: Applied to the piston crown, ring grooves, and pin bore for increased resistance to wear, heat, detonation damage, and ring microwelding
• Forged construction: Designed for high-load, high-cylinder-pressure, and high-heat environments
• Performance application: Suitable for naturally aspirated engines and builds using power adders
• Kit contents: Includes ring packs, wrist pins, and circlips
• Manufacturing: Engineered, forged, and machined in the USA in Mentor, Ohio
• Fitment: Fits select Harley-Davidson models listed in the product description

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: powersports
Epa: N/A
Clearance Item: t
Regular Stock: false
Units Per Sku: 1
Fitment:
2017 Harley Davidson FLHTKSE CVO Limited Base
2017 Harley Davidson FLHXSE CVO Street Glide Base
2018 Harley Davidson FLFBS Fat Boy 114 Base
2018 Harley Davidson FLHCS Heritage Classic 114 Base
2018 Harley Davidson FLHTKSE CVO Limited Base
2018 Harley Davidson FLHXSE CVO Street Glide Base
2018 Harley Davidson FXBRS Breakout 114 Base
2018 Harley Davidson FXFBS Fat Bob 114 Base
2019 Harley Davidson FLFBS Fat Boy 114 Base
2019 Harley Davidson FLHCS Heritage Classic 114 Base
2019 Harley Davidson FLHRXS Road King Special Base
2019 Harley Davidson FLHTCUTG Tri Glide Ultra Base
2019 Harley Davidson FLHTKL Ultra Limited Low Base
2019 Harley Davidson FLHTKSE CVO Limited Base
2019 Harley Davidson FLHXS Street Glide Special Base
2019 Harley Davidson FLHXSE CVO Street Glide Base
2019 Harley Davidson FLRT Freewheeler Base
2019 Harley Davidson FLTRU Road Glide Ultra Base
2019 Harley Davidson FLTRXS Road Glide Special Base
2019 Harley Davidson FXBRS Breakout 114 Base
2019 Harley Davidson FXDRS FXDR 114 Base
2019 Harley Davidson FXFBS Fat Bob 114 Base
2020 Harley Davidson FLFBS Fat Boy 114 Base
2020 Harley Davidson FLHCS Heritage Classic 114 Base
2020 Harley Davidson FLHRXS Road King Special Base
2020 Harley Davidson FLHTCUTG Tri Glide Ultra Base
2020 Harley Davidson FLHTKSE CVO Limited Base
2020 Harley Davidson FLHXS Street Glide Special Base
2020 Harley Davidson FLHXSE CVO Street Glide Base
2020 Harley Davidson FLRT Freewheeler Base
2020 Harley Davidson FLTRK Road Glide Limited Base
2020 Harley Davidson FLTRXS Road Glide Special Base
2020 Harley Davidson FXBRS Breakout 114 Base
2020 Harley Davidson FXFBS Fat Bob 114 Base
2021 Harley Davidson FLFBS Fat Boy 114 Base
2021 Harley Davidson FLHCS Heritage Classic 114 Base
2021 Harley Davidson FLHRXS Road King Special Base
2021 Harley Davidson FLHTCUTG Tri Glide Ultra Base
2021 Harley Davidson FLHTKSE CVO Limited Base
2021 Harley Davidson FLHXS Street Glide Special Base
2021 Harley Davidson FLHXSE CVO Street Glide Base
2021 Harley Davidson FLRT Freewheeler Base
2021 Harley Davidson FLTRK Road Glide Limited Base
2021 Harley Davidson FLTRXS Road Glide Special Base
2021 Harley Davidson FXBBS Street Bob 114 Base
2021 Harley Davidson FXFBS Fat Bob 114 Base
2022 Harley-Davidson FLFBS Fat Boy 114 Base
2022 Harley-Davidson FLHCS Heritage Classic 114 Base
2022 Harley-Davidson FLHRXS Road King Special Base
2022 Harley-Davidson FLHTCUTG Tri Glide Ultra Base
2022 Harley-Davidson FLHXS Street Glide Special Base
2022 Harley-Davidson FLRT Freewheeler Base
2022 Harley-Davidson FLTRK Road Glide Limited Base
2022 Harley-Davidson FLTRXS Road Glide Special Base
2022 Harley-Davidson FXBBS Street Bob 114 Base
2022 Harley-Davidson FXFBS Fat Bob 114 Base
2023 Harley-Davidson FLFBS Fat Boy 114 Base
2023 Harley-Davidson FLHCS Heritage Classic 114 Base
2023 Harley-Davidson FLHRXS Road King Special Base
2023 Harley-Davidson FLHTCUTG Tri Glide Ultra Base
2023 Harley-Davidson FLHXS Street Glide Special Base
2023 Harley-Davidson FLRT Freewheeler Base
2023 Harley-Davidson FLTRK Road Glide Limited Base
2023 Harley-Davidson FLTRT Road Glide 3 Base
2023 Harley-Davidson FLTRXS Road Glide Special Base
2023 Harley-Davidson FXBBS Street Bob 114 Base
2023 Harley-Davidson FXFBS Fat Bob 114 Base
2024 Harley-Davidson FLFBS Fat Boy 114 Base
2024 Harley-Davidson FLHCS Heritage Classic 114 Base
2024 Harley-Davidson FLHRXS Road King Special Base
2024 Harley-Davidson FLHTCUTG Tri Glide Ultra Base
2024 Harley-Davidson FLRT Freewheeler Base
2024 Harley-Davidson FLTRK Road Glide Limited Base
2024 Harley-Davidson FLTRT Road Glide 3 Base
2024 Harley-Davidson FXBBS Street Bob 114 Base
2025 Harley-Davidson FLHRXS Road King Special Base
2025 Harley-Davidson FLHTCUTG Tri Glide Ultra Base
2025 Harley-Davidson FLRT Freewheeler Base
2025 Harley-Davidson FLTRT Road Glide 3 Base