Monster big bore piston kits require modifications/upgrades to your engine that include: case boring, crankshaft balancing and CNC cylinder head upgrades
Custom forged piston kit with high-tension rings specifically designed for NSC cylinders and a head/base gasket set
Upgraded cylinder studs and head bolts recommended (sold separately)
Made in the USA
Product Note:Requires case boring, crankshaft balancing and CNC cylinder head upgrades to complete installation.
Specification
Details
Bore
Varies (make selection above)
Compression Ratio
Varies (make selection above)
Country of Origin
USA
Displacement
Varies (make selection above)
Engine Type
Varies (make selection above)
Material
Aluminum
Piston Type
Varies (make selection above)
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Harley Davidson
FLD Dyna Switchback 2012-2016
FLDE Softail Deluxe 2018-2020
FLFB Softail Fat Boy 2018-2019, 2025
FLFBS Softail Fat Boy 114 2018-2024
FLHC Softail Heritage Classic 2018-2021, 2025
FLHCS Softail Heritage Classic 114 2018-2024
FLHR Road King 2017-2022
FLHRC Road King Classic 2007-2013
FLHRCI Road King Classic 1999-2006
FLHRI Road King 1999-2006
FLHRS Road King Custom 2004-2007
FLHRSI Road King Custom 2004-2006
FLHRXS Road King Special 2017-2025
FLHT Electra Glide Standard 1999-2009, 2019-2022
FLHTC Electra Glide Classic 1999-2005, 2007-2013
FLHTCI Electra Glide Classic 1999-2006
FLHTCU Electra Glide Ultra Classic 2017-2019
FLHTCU Ultra Classic Electra Glide 2000-2016
FLHTCUI Ultra Classic Electra Glide 1999-2006
FLHTCUL Electra Glide Ultra Classic Low 2015-2016
FLHTCUTG Tri Glide Ultra Classic 2009-2016, 2022-2025
