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S&S 128" Big Bore Kit For Harley 114" Milwaukee Eight 2017-2020

$989.96
$1,099.95
Save $109.99 10%

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S&S 128" Big Bore Kit For Harley 114" Milwaukee Eight

Upgrade your 114" M8 motor to the largest bore size possible, without required machining of your cases. This is as simple as big power gets, with everything necessary for installation included.

Features:

  • Bolt-on kit, the largest cylinder bore possible for 114" M8 motors without required machining of the crankcases
  • 4.250" bore, 4.500" stroke
  • 11:1 forged pistons with rings, pins and clips
  • All gaskets and hardware required for installation included
  • Wrinkle black finish
  • Made in the USA
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Please review this product's fitment notes & exceptions prior to purchase: Add to Cart

This product is vehicle specific. Click here to select your bike to ensure fitment.

Fitment Notes & Exceptions
  • Fits models with 114" Milwaukee Eight motor only

This Product Fits:


Harley Davidson
Electra Glide Ultra Limited CVO/SE FLHTKSE 2017, 2018, 2019, 2020
Road Glide CVO/SE FLTRXSE 2018, 2019
Softail Breakout 114 FXBRS 2018, 2019, 2020
Softail Fat Bob 114 FXFBS 2018, 2019, 2020
Softail Fat Boy 114 FLFBS 2018, 2019, 2020
Softail FXDR 114 FXDRS 2019, 2020
Softail Heritage Classic 114 FLHCS 2018, 2019, 2020
Softail Low Rider S FXLRS 2020
Street Glide CVO/SE FLHXSE 2017, 2018, 2019, 2020
Street Glide Special FLHXS 2019, 2020
Product Style Item # Store SKU Manufacturer Product # Availability
Non-Highlighted Fins 1591334 910-0685 In Stock: Ships within 24 hours
Highlighted Fins 1591335 910-0684 Available: Requires 1-3 business days of lead time prior to shipment