Description

S&S Big Bore Kit for M8 Touring and Softail Models

• 107″ to 124″ Big Bore Kit
• 114″ to 128″ Big Bore Kit
• 114″ & 117″ CVO to 128″ Big Bore Kit
• Bolt-on kit is the largest possible bore that does not require machining of the crankcases
• 4.250″ bore
• Forged pistons with rings, pins and clips
• 11:1 compression ratio with stock heads
• Available in wrinkle black or black granite (128″ only) with or without highlighted fins
• All necessary gaskets and hardware required for installation included
• Made in the U.S.A.

124″ Fits:

2017 – 2019 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI
2017 – 2019 Harley-Davidson Road Glide Custom FLTRX
2017 – 2019 Harley-Davidson Road King EFI FLHR
2018 – 2019 Harley-Davidson Softail Breakout FXBR
2018 – 2019 Harley-Davidson Softail Deluxe FLDE
2018 – 2019 Harley-Davidson Softail Fat Bob FXFB
2018 – 2019 Harley-Davidson Softail Fat Boy FLFB
2018 – 2019 Harley-Davidson Softail Heritage Classic FLHC
2018 – 2019 Harley-Davidson Softail Low Rider FXLR
2018 – 2019 Harley-Davidson Softail Slim FLSL
2018 – 2019 Harley-Davidson Softail Sport Glide FLSB
2018 – 2019 Harley-Davidson Softail Street Bob FXBB
2017 – 2019 Harley-Davidson Street Glide EFI FLHX

128″ Fits:

2017 – 2019 Harley-Davidson Electra Glide Ultra Limited FLHTK
2017 – 2019 Harley-Davidson Electra Glide Ultra Limited Low FLHTKL
2017 – 2019 Harley-Davidson Freewheeler FLRT
2019 Harley-Davidson FXDR 114
2017 – 2019 Harley-Davidson Road Glide Special FLTRXS
2017 – 2019 Harley-Davidson Road Glide Ultra FLTRU
2017 – 2019 Harley-Davidson Road King Special FLHRXS
2018 – 2019 Harley-Davidson Softail Breakout 114 FXBRS
2018 – 2019 Harley-Davidson Softail Fat Bob 114 FXFBS
2018 – 2019 Harley-Davidson Softail Fat Boy 114 FLFBS
2018 – 2019 Harley-Davidson Softail Heritage Classic 114 FLHCS
2017 – 2019 Harley-Davidson Street Glide Special FLHXS
2017 – 2019 Harley-Davidson Tri Glide Ultra Classic FLHTCUTG