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We offer shipping to most countries. Simply select your country once you have added items to your basket and you'll be shown an instant price for shipping without having to advance in to the check out process.

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200,000+ Parts & Accessories
Our catalogue has grown extensively over the years and we now source a huge range of parts and accessories from a number of distributors from round the world.

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Order Online Or By Phone 
We're more than happy to have customers order which ever way they prefer. If you'd like to discuss anything over the phone prior to ordering we'd be delighted to help you.

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Simple Exchange Or Refund Policy 
We know when customers receive their orders there is always the possibility of needing to exchange or return items for a refund. Rest assured if you need to, we make it simple. See T&C's for more details.

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Price Match Promise 
We offer a price match promise on all items we sell. Use the "Seen it cheaper?" option found on the product pages to request a price match.

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ARH Custom Custom Motorcycle Parts and Accessories ARH Custom Custom Motorcycle Parts and Accessories

S&S Cycle Big Bore Conversion Cylinder & Piston Kit From 107 Inch To 124 Inch In Black Without Highlights For Harley Davidson 2017-2023 Touring M8 & 2018-2023 Softail M8 Models (910-0681)

  • S&S Cycle Big Bore Conversion Cylinder & Piston Kit From 107 Inch To 124 Inch In Black Without Highlights For Harley Davidson 2017-2023 Touring M8 & 2018-2023 Softail M8 Models (910-0681)
£1,280.98 inc.VAT
Add to Basket Wishlist
Seen it cheaper elsewhere?

Our Price Promise

Seen this item cheaper on another website? Let us try and match it!

We do our upmost to keep our prices competitive but due to the number of items we sell, you may occasionally find a better price advertised elsewhere. If you have seen a cheaper price on another website let us know by filling in this form. If we’re able to match the price, we’ll look to respond via email with a unique discount code within 1 hour (during working hours) so you're not waiting too long.

Your email:
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Please note:

  1. The item must be identical to the one on our website listing and must show as being available.
  2. Price match applies to items sourced from authorised UK retailers only, not private sellers.
  3. Prices will only be matched from UK based websites with prices in GBP.
  4. ARH Custom reserve the right to price match only one of each item per customer.
  5. ARH Custom reserve the right to withdraw the price match policy at any time.

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EU stock Estimated shipping date between 24 Dec and 31 Dec.

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 24 Dec and 31 Dec.

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Instructions
About Shipping Costs

Shipping Cost

To view the total cost including shipping please advance to the basket and select your shipping country.

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Features & Benefits

  • Available for 107 M8 models
  • Available in both highlighted and non highlighted versions
  • 107 to 124" big bore kit
  • Wrinkle black finish
  • Highlighted Fins
  • Bolt on kit. No Machining Required
  • Includes gaskets and hardware required for installation
  • 4.250" bore
  • Forged Pistons
  • 11:1 compression ratio

***S&S recommend using S&S Cycle Head Bolts for M8, part number 900-1006 for all big bore applications.

Specifications +

Compression Ratio: 11:1
Displacement: 124"
Base Colour: Black
Style: Big Bore
Material: Iron
Units: Kit
Bore Size: 4,250"
Stroke Length: 4-3/8"
Colour/Finish: Black
Compression Ratio Imperial: 11.0:1
Product Name: Cylinder Kit

Part numbers +

  • 09310833
  • 0931-0833
  • 910-0681
  • 574117
  • 782777

Fitment +

    HARLEY DAVIDSON
  • Softail Deluxe - FLDE: 2018-2023
  • Softail Fat Boy - FLFB: 2018-2023
  • Softail Heritage Classic - FLHC: 2018-2023
  • Road King - FLHR: 2017-2023
  • Road King Classic - FLHRC: 2017-2023
  • Electra Glide Standard - FLHT: 2017-2023
  • Electra Glide Ultra Classic - FLHTCU: 2017-2023
  • Tri Glide Ultra Classic - FLHTCUTG: 2017-2023
  • Street Glide - FLHX: 2017-2023
  • Freewheeler - FLRT: 2017-2023
  • Softail Sport Glide - FLSB: 2018-2024
  • Softail Slim - FLSL: 2018-2023
  • Road Glide Ultra - FLTRU: 2017-2023
  • Road Glide - FLTRX: 2017-2024
  • Softail Street Bob - FXBB: 2018-2023
  • Softail Breakout - FXBR: 2018-2019
  • Softail Fat Bob - FXFB: 2018-2023
  • Softail Low Rider - FXLR: 2018-2023
  • Softail Standard - FXST: 2018-2024

Delivery +

All orders are shipped with either DPD, Fedex, UPS, DHL or Royal Mail. The courier used to ship your order is determined by ourselves once your order has been placed and normally depends on the size, volume and the shipping destination. The selected courier for your order will be quoted in your order confirmation email which you will receive once we have processed your order. Once your order has been shipped, this will be confirmed via email and you will receive a tracking number so you can keep an eye on your shipments progress.

S&S Cycle Big Bore Conversion Cylinder & Piston Kit From 114 Inch To 128 Inch In Black With Highlights For Harley Davidson 2017-2023 Touring M8 & 2018-2023 Softail M8 Models (910-0684)S&S Cycle Big Bore Conversion Cylinder & Piston Kit From 114 Inch To 128 Inch In Black With Highlights For Harley Davidson 2017-2023 Touring M8 & 2018-2023 Softail M8 Models (910-0684)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 24 Dec and 31 Dec.

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£1,308.85 inc.VAT
S&S Cycle 128 CI Power Package In Wrinkle Black With Highlighted Fins For 2017-2023 M8 114 & 117 Oil Cooled Gear Drive Cam Models (310-1104A)S&S Cycle 128 CI Power Package In Wrinkle Black With Highlighted Fins For 2017-2023 M8 114 & 117 Oil Cooled Gear Drive Cam Models (310-1104A)

US stock

Usually ships in 3-4 weeks

All orders are shipped out of our UK premises. Estimated shipping date between 15 Jan and 21 Jan.

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£3,697.06 inc.VAT
S&S Cycle 128 CI Power Package In Wrinkle Black With Non-Highlighted Fins For 2017-2023 M8 114 & 117 Oil Cooled Gear Drive Cam Models (310-1106A)S&S Cycle 128 CI Power Package In Wrinkle Black With Non-Highlighted Fins For 2017-2023 M8 114 & 117 Oil Cooled Gear Drive Cam Models (310-1106A)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 24 Dec and 31 Dec.

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£3,324.11 inc.VAT
S&S Cycle 128 CI Power Package In Black Granite With Highlighted Fins For 2017-2023 M8 114 & 117 Oil Cooled Gear Drive Cam Models (310-1110A)S&S Cycle 128 CI Power Package In Black Granite With Highlighted Fins For 2017-2023 M8 114 & 117 Oil Cooled Gear Drive Cam Models (310-1110A)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 24 Dec and 31 Dec.

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£3,324.11 inc.VAT
S&S Cycle Big Bore Conversion Cylinder & Piston Kit From 107 Inch To 124 Inch In Black With Highlights For Harley Davidson 2017-2023 Touring M8 & 2018-2023 Softail M8 Models (910-0625)S&S Cycle Big Bore Conversion Cylinder & Piston Kit From 107 Inch To 124 Inch In Black With Highlights For Harley Davidson 2017-2023 Touring M8 & 2018-2023 Softail M8 Models (910-0625)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 24 Dec and 31 Dec.

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£1,308.85 inc.VAT

Back In Stock Notification

Send us your email and we'll notify know when this item is available.


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Shipping Cost

To view the total cost including shipping please advance to the basket and select your shipping country.

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