KB Performance Piston Kit - 3.875" +0.005" - 10.0:1 CR - 103" Twin Cam | 96" Twin Cam Big Bore
KB Performance
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SKU: 90-35181
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Product Details
Features
- Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy
- Allows a tighter fit and longer piston and ring life
- Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005") tolerances from piston to piston
- Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
- Replacement piston rings sold separately
- KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.
- Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation.
Specifications
| UPC | 800745151469 |
|---|---|
| Vendor Part Number | KB409C005 |
| Package Height | 5.62 |
| Package Length | 5.92 |
| Package Width | 5.64 |
| Parts Unlimited # | 0910-0916 |
| Bore Oversize - Imperial | +0.005" |
| Bore Size Imperial | 3.875" |
| Brand | KB Performance |
| Compression Ratio | 10.0:1 |
| Displacement | 103" |
| Piston Head Shape | Flat Top |
| Piston Material | Hypereutectic Alloy |
| Riding Style | Street |
| Ring Material | Moly Coated |
| Stroke Length (in) | 4.375" |
| Unit of Measure | Kit |
Fitment
| YEAR | MAKE | MODEL |
|---|---|---|
| 2012 - 2016 | Harley-Davidson | FLD Switchback |
| 2007 - 2016 | Harley-Davidson | FLHR Road King |
| 2015 - 2016 | Harley-Davidson | FLHTKL Ultra Limited Low |
| 2007 - 2016 | Harley-Davidson | FLHX Street Glide |
| 2007 - 2016 | Harley-Davidson | FLSTN Softail Deluxe |
| 2011 - 2016 | Harley-Davidson | FLTRU Road Glide Ultra |
| 2007 - 2010 | Harley-Davidson | FXD Dyna Super Glide |
| 2007 - 2014 | Harley-Davidson | FXDC Super Glide Custom |
| 2007 - 2009 | Harley-Davidson | FXSTB Night Train |
| 2007 - 2010 | Harley-Davidson | FXSTC Softail Custom |
Fitment Disclosure
For reference only, please consult your owner’s manual to confirm your fitment.
General Safety Warning
Failure to follow the manufacturer's recommendations and requirements can cause product failure resulting in serious injury or death. While effort has been taken to collect accurate fitment information, 43 Moto accepts no liability for loss or damage resulting from errors or omissions. If you believe any of the information provided is erroneous, please email [email protected].
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