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S&S 132" Big Bore Kit

Item: 403992

$1349.96 – $1455.67

Select Your Vehicle - Fitment Guaranteed

S&S 132" Big Bore Kit


  • Huge bore increase to 4.320" means huge power gains on your Milwaukee Eight 114 inch engine
  • Retains stock engine height
  • Powder coat finish match factory finish, giving the bike a sleeper advantage
  • Works with stock crankcases
  • MLS (multi-layered steel) head gaskets
  • Original engine serial numbers are retained
  • Includes cam cover badge
  • Made in the USA
Specification Details
Bore 4.32 in.
Color Varies (make selection above)
Compression Ratio 11:1
Country of Origin USA
Displacement 132CI
Engine Type Milwaukee Eight 114
Finish Powder Coated
Stroke 4.5 in.
Warranty 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
  • FLFBS Softail Fat Boy 114 2018-2024
  • FLHCS Softail Heritage Classic 114 2018-2024
  • FLHRXS Road King Special 2019-2023
  • FLHTCU Electra Glide Ultra Classic 2019
  • FLHTCUTG Tri Glide Ultra Classic 2019-2024
  • FLHTK Electra Glide Ultra Limited 2019-2023
  • FLHXS Street Glide Special 2019-2023
  • FLRT Freewheeler 2022-2024
  • FLTRK Road Glide Limited 2020-2023
  • FLTRT Road Glide 3 2023-2024
  • FLTRU Road Glide Ultra 2019
  • FLTRXS Road Glide Special 2019-2023
  • FXBBS Softail Street Bob 114 2021-2024
  • FXBR Softail Breakout 2018-2019
  • FXBRS Softail Breakout 114 2018-2020
  • FXDR Softail 114 2019-2020
  • FXFBS Softail Fat Bob 114 2018-2023
  • FXLRS Softail Low Rider S 2020-2021

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Questions & Answers

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what is the compression ratio with these pistons?

Assuming you're working with 0.030" head gaskets, you'd obtain a compression ratio of 11:1 with this cylinder kit.

By Tom
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