KB409C020 Performance, 96" to 103" big bore piston set. +.020"
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Specifications
- Brand
- KB Performance Piston
- Part Number
- KB409C020
- OEM Reference
- —
- Pack Quantity
- Sold as a set
- Category
- Pistons And Rings Kits
- VAT Rate
- 20%
About This Product
If you are looking to punch out your 2007 to 2017 Twin Cam from 96 to 103 cubic inches, this KB Performance big bore piston set is the right tool for the job. By boring your stock cylinders to 3-7/8", you gain significant displacement while maintaining a street-friendly 10.0:1 compression ratio with standard 85cc heads. These +.020" oversize pistons are flat-top designs made from 390 hypereutectic cast aluminum. The high 16% silicone content allows for tighter piston-to-wall clearances, which minimizes piston slap and noise while extending the life of your bore. Sold as a set, the kit includes everything needed for the swap, though you must ensure the top compression ring is gapped with additional clearance as per the instructions.
Manufacturer part number: KB409C020.
Fitment
64 models07-17 Twin Cam
Dyna 20 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2008–2017 | Dyna Fat Bob FXDF |
| Harley-Davidson | 2012–2017 | Dyna Fat Bob FXDF 103 |
| Harley-Davidson | 2007–2017 | Dyna Low Rider FXDL |
| Harley-Davidson | 2014–2017 | Dyna Low Rider FXDL 103 |
| Harley-Davidson | 2016–2017 | Dyna Low Rider S FXDLS |
| Harley-Davidson | 2007–2017 | Dyna Street Bob FXDB |
| Harley-Davidson | 2014–2017 | Dyna Street Bob FXDB 103 |
| Harley-Davidson | 2013 | Dyna Street Bob FXDBA |
| Harley-Davidson | 2013 | Dyna Street Bob FXDBA 103 |
| Harley-Davidson | 2015 | Dyna Street Bob FXDBB |
| Harley-Davidson | 2014–2015 | Dyna Street Bob FXDBB 103 |
| Harley-Davidson | 2013–2016 | Dyna Street Bob FXDBP 103 |
| Harley-Davidson | 2016 | Dyna Street Bob Limited FXDBC |
| Harley-Davidson | 2016 | Dyna Street Bob Limited FXDBC 103 |
| Harley-Davidson | 2012–2016 | Dyna Switchback FLD |
| Harley-Davidson | 2012–2016 | Dyna Switchback FLD 103 |
| Harley-Davidson | 2008 | Dyna Wide Glide 105th Anv FXDWG |
| Harley-Davidson | 2007–2016 | Dyna Wide Glide FXDWG |
| Harley-Davidson | 2012–2017 | Dyna Wide Glide FXDWG 103 |
| Harley-Davidson | 2017 | Low Rider FXDL 103 |
Softail 26 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2017 | Breakout FXSB |
| Harley-Davidson | 2008–2011 | Cross Bones FLSTSB |
| Harley-Davidson | 2017 | Deluxe FLSTN |
| Harley-Davidson | 2007–2017 | Fat Boy FLSTF |
| Harley-Davidson | 2012–2015 | Fat Boy FLSTF 103 |
| Harley-Davidson | 2013 | Fat Boy Lo Anv FLSTFB |
| Harley-Davidson | 2013 | Fat Boy Lo Anv FLSTFB 103 |
| Harley-Davidson | 2010–2017 | Fat Boy Lo FLSTFB |
| Harley-Davidson | 2012–2015 | Fat Boy Lo FLSTFB 103 |
| Harley-Davidson | 2016–2017 | Fat Boy S FLSTFBS |
| Harley-Davidson | 2013 | Heritage Softail Classic Anv FLSTC |
| Harley-Davidson | 2013 | Heritage Softail Classic Anv FLSTC 103 |
| Harley-Davidson | 2007–2017 | Heritage Softail Classic FLSTC |
| Harley-Davidson | 2012–2015 | Heritage Softail Classic FLSTC 103 |
| Harley-Davidson | 2008–2011 | Rocker C FXCWC |
| Harley-Davidson | 2008–2009 | Rocker FXCW |
| Harley-Davidson | 2017 | Slim FLS |
| Harley-Davidson | 2017 | Slim S FLSS |
| Harley-Davidson | 2013–2016 | Softail Breakout FXSB |
| Harley-Davidson | 2013–2015 | Softail Breakout FXSB 103 |
| Harley-Davidson | 2007–2016 | Softail Deluxe FLSTN |
| Harley-Davidson | 2012–2015 | Softail Deluxe FLSTN 103 |
| Harley-Davidson | 2012–2016 | Softail Slim FLS |
| Harley-Davidson | 2012–2015 | Softail Slim FLS 103 |
| Harley-Davidson | 2016 | Softail Slim S FLSS |
| Harley-Davidson | 2007–2015 | Softail Standard FXST |
Touring 17 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2014 | CVO Limited FLHTK 103 |
| Harley-Davidson | 2013 | Electra Glide Ultra Limited Anv FLHTK |
| Harley-Davidson | 2010–2013 | Electra Glide Ultra Limited FLHTK |
| Harley-Davidson | 2010–2013 | Road Glide Custom FLTRX |
| Harley-Davidson | 2011 | Road Glide Custom FLTRX 103 |
| Harley-Davidson | 2015–2017 | Road Glide FLTRX |
| Harley-Davidson | 2015–2017 | Road Glide Special FLTRXS |
| Harley-Davidson | 2011–2017 | Road Glide Ultra FLTRU |
| Harley-Davidson | 2007–2017 | Road King Classic FLHRC |
| Harley-Davidson | 2011 | Road King Classic FLHRC 103 |
| Harley-Davidson | 2017 | Road King Special FLHRXS |
| Harley-Davidson | 2007–2017 | Street Glide FLHX |
| Harley-Davidson | 2011 | Street Glide FLHX 103 |
| Harley-Davidson | 2014–2017 | Street Glide Special FLHXS |
| Harley-Davidson | 2014–2017 | Ultra Limited FLHTK |
| Harley-Davidson | 2015–2017 | Ultra Limited Low FLHTKL |
| Harley-Davidson | 2017 | Ultra Limited Shrine FLHTK |
Trike 1 model
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2015–2017 | Freewheeler FLRT |
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