S&S Cycle 2007+ BT 4.250in Bore 4.840in - Wrinkle Black w/o Highlight
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® platform (2017 and newer big twins) and open up a whole new level of performance for these engines. Combining a new design forged piston with their 4.25" cylinders to net a tire melting 131 cubic inches when paired with their 4.625" stroker crank. We build our big bore kits and cranks to much tighter tolerarances and with higher quality materials than the factory parts. This new piston/cylinder kit will be a solid platform for massive power.
- Must be used with our stroker flywheels to achieve 131" displacement (part #s 320-0605, 320-0620)
- Powder coat finish match factory finish, giving the bike a "sleeper" advantage
- Huge displacement increase means huge power increase
- .030" MLS (multi-layered steel) head gaskets
- Original engine serial numbers are retained
- Includes 131" Cam Cover Badge
- Works with stock crankcases
- Retains stock engine height
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2018-2020 | Harley-Davidson | FLDE Deluxe 107 | Base |
| 2018-2020 | Harley-Davidson | FLFBS Fat Boy 114 | Base |
| 2018-2020 | Harley-Davidson | FLHCS Heritage Classic 114 | Base |
| 2017-2020 | Harley-Davidson | FLHR Road King | Base |
| 2017-2020 | Harley-Davidson | FLHRXS Road King Special | Base |
| 2019-2020 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 2017-2019 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | Base |
| 2020 | Harley-Davidson | FLHTCUTGSE CVO Tri Glide | Base |
| 2017-2020 | Harley-Davidson | FLHTK Ultra Limited | Base |
| 2017-2019 | Harley-Davidson | FLHTKL Ultra Limited Low | Base |
| 2017-2020 | Harley-Davidson | FLHTKSE CVO Limited | Base |
| 2017-2020 | Harley-Davidson | FLHX Street Glide | Base |
| 2017-2020 | Harley-Davidson | FLHXS Street Glide Special | Base |
| 2017-2020 | Harley-Davidson | FLHXSE CVO Street Glide | Base |
| 2017-2020 | Harley-Davidson | FLRT Freewheeler | Base |
| 2020 | Harley-Davidson | FLTRK Road Glide Limited | Base |
| 2017-2019 | Harley-Davidson | FLTRU Road Glide Ultra | Base |
| 2017-2020 | Harley-Davidson | FLTRX Road Glide | Base |
| 2017-2020 | Harley-Davidson | FLTRXS Road Glide Special | Base |
| 2018-2020 | Harley-Davidson | FXBRS Breakout 114 | Base |
| 2019-2020 | Harley-Davidson | FXDRS FXDR 114 | Base |
| 2018-2020 | Harley-Davidson | FXFBS Fat Bob 114 | Base |
| 2020 | Harley-Davidson | FXLRS Low Rider S 114 | Base |
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.