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Rocket Cams Big Bore Cylinder Kit

Item: 398653

$1241.92 – $1509.83

Select Your Vehicle - Fitment Guaranteed

Rocket Cams Big Bore Cylinder Kit


There is no replacement for displacement' is the mindset we have lived by for over 25 years in the V-Twin industry. Rocket Cams is proud to introduce their high quality and durable Cylinder and Piston Big Bore Kits, with all components made right here, in the USA! The cylinders are casted from premium materials and perfectly fitted and matched to their paired up Wiseco pistons sets. Rocket Cams Cylinders come power coated textured black with machine fins, for a perfect blend to an OE Harley motor. All kits come with Cometic head and base gaskets and are ready for install. This ultimate combination of industry leading manufacturers and experienced racers, will bring bolt on horsepower to a new level. See the chart below for our cam and component suggestions to get the best results and customer satisfaction.

  • M8 128" CYLINDER KIT
  • Brings stock M8 114" and 117" motors to 128"
  • 4.5" Stroke and 11:1 Compression
  • Wiseco forged pistons with coated skirts
  • .040 head gasket set
  • M8 124" CYLINDER KIT
  • Brings stock M8 107" motors to 124"
  • 4.375" Stroke and 11:1 Compression
  • Wiseco forged pistons with coated skirts
  • .030 head gasket set
  • TWIN CAM 110" CYLINDER KIT
  • Brings 07-16 stock 96" and 103" motors to 110"
  • 4.375" Stroke and 10.5:1 Compression
  • Wiseco forged pistons
Specification Details
Displacement 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
  • FLFBS Softail Fat Boy 114 2018-2024
  • FLHC Softail Heritage Classic 2018-2021
  • FLHCS Softail Heritage Classic 114 2018-2021
  • FLHR Road King 2007-2021
  • FLHRC Road King Classic 2007-2013
  • FLHRS Road King Custom 2007
  • FLHRXS Road King Special 2018-2021
  • FLHTC Electra Glide Classic 2007-2013
  • FLHTCU Electra Glide Ultra Classic 2018-2019
  • FLHTCU Ultra Classic Electra Glide 2007-2016
  • FLHTCUL Electra Glide Ultra Classic Low 2015-2016
  • FLHTCUTG Tri Glide Ultra Classic 2009-2021
  • FLHTK Electra Glide Ultra Limited 2010-2021
  • FLHTKL Electra Glide Ultra Limited Low 2015-2019
  • FLHX Street Glide 2007-2021
  • FLHXS Street Glide Special 2014-2021
  • FLHXXX Street Glide Trike 2010-2011
  • FLRT Freewheeler 2015-2021
  • FLS Softail Slim 2012-2016
  • FLSB Softail Sport Glide 2018-2021
  • FLSL Softail Slim 2018-2021
  • FLSS Softail Slim S 2016
  • FLSTC Heritage Softail Classic 2007-2016
  • FLSTF Softail Fat Boy 2007-2016
  • FLSTFB Softail Fat Boy Lo 2010-2016
  • FLSTFBS Softail Fat Boy S 2016
  • FLSTN Softail Deluxe 2007-2016
  • FLSTSB Softail Cross Bones 2008-2011
  • FLSTSC Softail Springer Classic 2007
  • FLTR Road Glide 2007-2009
  • FLTRK Road Glide Limited 2020-2021
  • FLTRU Road Glide Ultra 2011-2013, 2016-2019
  • FLTRX Road Glide 2015-2021
  • FLTRX Road Glide Custom 2010-2013
  • FLTRXS Road Glide Special 2015-2021
  • FXBB Softail Street Bob 2018-2020
  • FXBR Softail Breakout 2018-2019
  • FXBRS Softail Breakout 114 2018-2020
  • FXCW Softail Rocker 2008-2009
  • FXCWC Softail Rocker C 2008-2011
  • FXD Dyna Super Glide 2007-2010
  • FXDB Dyna Street Bob 2007-2016
  • FXDC Dyna Super Glide Custom 2007-2014
  • FXDF Dyna Fat Bob 2008-2016
  • FXDL Dyna Low Rider 2007-2009, 2014-2016
  • FXDLS Dyna Low Rider S 2016
  • FXDR Softail 114 2019-2020
  • FXDWG Dyna Wide Glide 2007-2008, 2010-2016
  • FXFB Softail Fat Bob 2018-2019
  • FXFBS Softail Fat Bob 114 2018-2021
  • FXLR Softail Low Rider 2018-2020
  • FXLRS Softail Low Rider S 2020-2021
  • FXS Softail Blackline 2011-2013
  • FXSB Softail Breakout 2013-2016
  • FXST Softail Standard 2007
  • FXSTB Softail Night Train 2007-2009
  • FXSTC Softail Custom 2007-2010
  • FXSTD Softail Deuce 2007

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