{"product_id":"s-s-cycle-2007-bt-3-937in-x-4-3-8in-piston-set","title":"S\u0026S Cycle 2007+ BT 3.937in x 4-3\/8in Piston Set","description":"These big bore pistons work with the stock 4-3\/8\" stroke flywheels to convert any 2007-'16 HD® big twin engine from 96\" or 103\" to 107\" displacement with 10.4:1 compression with stock heads. Stock cylinders may be bored to accomodate larger pistons, but we recommend S\u0026amp;S 3.927\" bore cylinders which feature high strength alloyed cast iron liners. Pistons are compatible with stock rods with tapered wristpin ends. S\u0026amp;S® 3.927\" bore pistons are machined to such close tolerances that it is not necessary to measure the piston. Just bore cylinders to nominal diameter +\/- 0.0005\" for correct clearance. Additionally, the low friction coating on the piston skirt makes taking measurements very difficult. 3.937\" standard bore.\n\u003cp\u003eUpgrade your Harley Davidson big twin engine with the S\u0026amp;S Cycle 2007+ BT 3.937-inch x 4-3\/8-inch piston set, designed to increase displacement from 96\" or 103\" to a powerful 107\". These high-performance pistons are engineered to work with stock 4-3\/8\" stroke flywheels and are compatible with stock rods featuring tapered wristpin ends, ensuring a reliable upgrade for your motorcycle. The pistons feature a compression ratio of 10.4:1, providing a balance of power and efficiency suitable for many riding styles. Stock cylinders can be bored to accommodate these larger pistons, but for optimal performance and durability, S\u0026amp;S recommends using their 3.927\" bore cylinders, which incorporate high-strength alloyed cast iron liners for durability under high stress. The pistons are machined to precise tolerances, eliminating the need for measurement, and are designed to bore cylinders to a nominal diameter with minimal clearance, simplifying installation. The low friction coating on the piston skirt reduces wear and enhances longevity, making these pistons ideal for performance-oriented rebuilds. Please note that these pistons are not carb approved and require carb acknowledgment prior to installation. As a versatile upgrade, they are compatible with several Harley Davidson models including the FLHX Street Glide, FXDF Fat Bob, and others from 2007 through 2009. Built by S\u0026amp;S Cycle, a trusted name in powersports performance, these pistons are a key component to achieving substantial engine displacement increases with reliable performance and quality craftsmanship.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eDesigned for 2007+ Harley Davidson big twin engines to increase displacement to 107\"\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCompatible with stock 4-3\/8\" stroke flywheels and stock rods with tapered wristpin ends\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eIncludes a compression ratio of 10.4:1 for balanced power and efficiency\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMachined to close tolerances; no measurement needed during installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLow friction coating on piston skirts reduces wear and extends engine life\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eWorks with stock cylinders or S\u0026amp;S 3.927\" bore cylinders featuring high-strength alloyed cast iron liners\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBore cylinders to nominal diameter for proper clearance, simplifying assembly\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart of high-performance powersports components by S\u0026amp;S Cycle\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFits multiple Harley Davidson models from 2007 to 2009, including Street Glide, Fat Bob, and Cross Bones\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2007\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2008\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2009\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2010\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2011\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2012\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2013\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2014\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2015\u003cbr\u003e\nHarley Davidson FLHR Road King Base 2016\u003cbr\u003e\nHarley Davidson FLHRC Road King Classic Base 2008\u003cbr\u003e\nHarley Davidson FLHRC Road King Classic Base 2009\u003cbr\u003e\nHarley Davidson FLHRC Road King Classic Base 2010\u003cbr\u003e\nHarley Davidson FLHRC Road King Classic Base 2011\u003cbr\u003e\nHarley Davidson FLHRC Road King Classic Base 2012\u003cbr\u003e\nHarley Davidson FLHRC Road King Classic Base 2013\u003cbr\u003e\nHarley Davidson FLHRS Road King Custom Base 2007\u003cbr\u003e\nHarley Davidson FLHT Electra Glide Standard Base 2007\u003cbr\u003e\nHarley Davidson FLHT Electra Glide Standard Base 2008\u003cbr\u003e\nHarley Davidson FLHT Electra Glide Standard Base 2009\u003cbr\u003e\nHarley Davidson FLHTC Electra Glide Classic Base 2009\u003cbr\u003e\nHarley Davidson FLHTC Electra Glide Classic Base 2010\u003cbr\u003e\nHarley Davidson FLHTC Electra Glide Classic Base 2011\u003cbr\u003e\nHarley Davidson FLHTC Electra Glide Classic Base 2012\u003cbr\u003e\nHarley Davidson FLHTC Electra Glide Classic Base 2013\u003cbr\u003e\nHarley Davidson FLHTCU Electra Glide Ultra Classic Base 2009\u003cbr\u003e\nHarley Davidson FLHTCU Electra Glide Ultra Classic Base 2010\u003cbr\u003e\nHarley Davidson FLHTCU Electra Glide Ultra Classic Base 2011\u003cbr\u003e\nHarley Davidson FLHTCU Electra Glide Ultra Classic Base 2012\u003cbr\u003e\nHarley Davidson FLHTCU Electra Glide Ultra Classic Base 2013\u003cbr\u003e\nHarley Davidson FLHTCU Electra Glide Ultra Classic Base 2014\u003cbr\u003e\nHarley Davidson FLHTCU Electra Glide Ultra Classic Base 2015\u003cbr\u003e\nHarley Davidson FLHTCU Electra Glide Ultra Classic Base 2016\u003cbr\u003e\nHarley Davidson FLHTCUL Electra Glide Ultra Classic Low Base 2015\u003cbr\u003e\nHarley Davidson FLHTCUL Electra Glide Ultra Classic Low Base 2016\u003cbr\u003e\nHarley Davidson FLHTCUSE4 CVO Ultra Classic Electra Glide Base 2009\u003cbr\u003e\nHarley Davidson FLHTCUSE5 CVO Ultra Classic Electra Glide Base 2010\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Base 2009\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Base 2011\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Base 2012\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Base 2013\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Base 2014\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2009\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2010\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2011\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2012\u003cbr\u003e\nHarley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2013\u003cbr\u003e\nHarley Davidson FLHTK Electra Glide Ultra Limited Base 2010\u003cbr\u003e\nHarley Davidson FLHTK Electra Glide Ultra Limited Base 2011\u003cbr\u003e\nHarley Davidson FLHTK Electra Glide Ultra Limited Base 2012\u003cbr\u003e\nHarley Davidson FLHTK Electra Glide Ultra Limited Base 2013\u003cbr\u003e\nHarley Davidson FLHTK Electra Glide Ultra Limited Base 2014\u003cbr\u003e\nHarley Davidson FLHTKSE CVO Limited Base 2015\u003cbr\u003e\nHarley Davidson FLHTKSE CVO Limited Base 2016\u003cbr\u003e\nHarley Davidson FLHTKSE CVO Limited Base 2017\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2007\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2008\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2009\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2010\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2011\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2012\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2013\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2014\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2015\u003cbr\u003e\nHarley Davidson FLHX Street Glide Base 2016\u003cbr\u003e\nHarley Davidson FLHXS Street Glide Special Base 2014\u003cbr\u003e\nHarley Davidson FLHXS Street Glide Special Base 2016\u003cbr\u003e\nHarley Davidson FLHXSE CVO Street Glide Base 2015\u003cbr\u003e\nHarley Davidson FLHXSE CVO Street Glide Base 2016\u003cbr\u003e\nHarley Davidson FLHXSE CVO Street Glide Base 2017\u003cbr\u003e\nHarley Davidson FLHXSE2 CVO Street Glide Base 2011\u003cbr\u003e\nHarley Davidson FLHXSE3 CVO Street Glide Base 2012\u003cbr\u003e\nHarley Davidson FLRT Freewheeler Base 2015\u003cbr\u003e\nHarley Davidson FLRT Freewheeler Base 2016\u003cbr\u003e\nHarley Davidson FLS Softail Slim Base 2012\u003cbr\u003e\nHarley Davidson FLS Softail Slim Base 2013\u003cbr\u003e\nHarley Davidson FLS Softail Slim Base 2014\u003cbr\u003e\nHarley Davidson FLS Softail Slim Base 2015\u003cbr\u003e\nHarley Davidson FLS Softail Slim Base 2016\u003cbr\u003e\nHarley Davidson FLS Softail Slim Base 2017\u003cbr\u003e\nHarley Davidson FLSS Softail Slim S Base 2016\u003cbr\u003e\nHarley Davidson FLSS Softail Slim S Base 2017\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2007\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2008\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2009\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2010\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2011\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2012\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2013\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2014\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2015\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2016\u003cbr\u003e\nHarley Davidson FLSTC Heritage Softail Classic Base 2017\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2007\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2008\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2009\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2010\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2011\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2012\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2013\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2014\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2015\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2016\u003cbr\u003e\nHarley Davidson FLSTF Fat Boy Base 2017\u003cbr\u003e\nHarley Davidson FLSTFB Fat Boy Lo Base 2010\u003cbr\u003e\nHarley Davidson FLSTFB Fat Boy Lo Base 2011\u003cbr\u003e\nHarley Davidson FLSTFB Fat Boy Lo Base 2012\u003cbr\u003e\nHarley Davidson FLSTFB Fat Boy Lo Base 2013\u003cbr\u003e\nHarley Davidson FLSTFB Fat Boy Lo Base 2014\u003cbr\u003e\nHarley Davidson FLSTFB Fat Boy Lo Base 2015\u003cbr\u003e\nHarley Davidson FLSTFB Fat Boy Lo Base 2016\u003cbr\u003e\nHarley Davidson FLSTFBS Fat Boy S Base 2016\u003cbr\u003e\nHarley Davidson FLSTFBS Fat Boy S Base 2017\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2007\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2008\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2009\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2010\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2011\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2012\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2013\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2014\u003cbr\u003e\nHarley Davidson FLSTN Softail Deluxe Base 2017\u003cbr\u003e\nHarley Davidson FLSTNSE CVO Softail Deluxe Base 2014\u003cbr\u003e\nHarley Davidson FLSTNSE CVO Softail Deluxe Base 2015\u003cbr\u003e\nHarley Davidson FLSTSB Cross Bones Base 2008\u003cbr\u003e\nHarley Davidson FLSTSB Cross Bones Base 2009\u003cbr\u003e\nHarley Davidson FLSTSB Cross Bones Base 2010\u003cbr\u003e\nHarley Davidson FLSTSB Cross Bones Base 2011\u003cbr\u003e\nHarley Davidson FLTR Road Glide Base 2007\u003cbr\u003e\nHarley Davidson FLTR Road Glide Base 2008\u003cbr\u003e\nHarley Davidson FLTR Road Glide Base 2009\u003cbr\u003e\nHarley Davidson FLTRSE3 CVO Road Glide Base 2009\u003cbr\u003e\nHarley Davidson FLTRU Road Glide Ultra Base 2011\u003cbr\u003e\nHarley Davidson FLTRU Road Glide Ultra Base 2012\u003cbr\u003e\nHarley Davidson FLTRU Road Glide Ultra Base 2013\u003cbr\u003e\nHarley Davidson FLTRU Road Glide Ultra Base 2016\u003cbr\u003e\nHarley Davidson FLTRUSE CVO Road Glide Ultra Base 2015\u003cbr\u003e\nHarley Davidson FLTRUSE CVO Road Glide Ultra Base 2016\u003cbr\u003e\nHarley Davidson FLTRX Road Glide Base 2015\u003cbr\u003e\nHarley Davidson FLTRX Road Glide Base 2016\u003cbr\u003e\nHarley Davidson FLTRX Road Glide Custom Base 2010\u003cbr\u003e\nHarley Davidson FLTRX Road Glide Custom Base 2011\u003cbr\u003e\nHarley Davidson FLTRX Road Glide Custom Base 2012\u003cbr\u003e\nHarley Davidson FLTRX Road Glide Custom Base 2013\u003cbr\u003e\nHarley Davidson FLTRXS Road Glide Special Base 2015\u003cbr\u003e\nHarley Davidson FLTRXS Road Glide Special Base 2016\u003cbr\u003e\nHarley Davidson FLTRXSE CVO Road Glide Custom Base 2012\u003cbr\u003e\nHarley Davidson FXCW Rocker Base 2008\u003cbr\u003e\nHarley Davidson FXCW Rocker Base 2009\u003cbr\u003e\nHarley Davidson FXCWC Rocker C Base 2008\u003cbr\u003e\nHarley Davidson FXCWC Rocker C Base 2009\u003cbr\u003e\nHarley Davidson FXCWC Rocker C Base 2010\u003cbr\u003e\nHarley Davidson FXCWC Rocker C Base 2011\u003cbr\u003e\nHarley Davidson FXD Dyna Super Glide Base 2007\u003cbr\u003e\nHarley Davidson FXD Dyna Super Glide Base 2008\u003cbr\u003e\nHarley Davidson FXD Dyna Super Glide Base 2009\u003cbr\u003e\nHarley Davidson FXD Dyna Super Glide Base 2010\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2007\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2008\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2009\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2010\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2011\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2012\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2013\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2014\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2015\u003cbr\u003e\nHarley Davidson FXDB Street Bob Base 2016\u003cbr\u003e\nHarley Davidson FXDC Super Glide Custom Base 2007\u003cbr\u003e\nHarley Davidson FXDC Super Glide Custom Base 2008\u003cbr\u003e\nHarley Davidson FXDC Super Glide Custom Base 2009\u003cbr\u003e\nHarley Davidson FXDC Super Glide Custom Base 2010\u003cbr\u003e\nHarley Davidson FXDC Super Glide Custom Base 2011\u003cbr\u003e\nHarley Davidson FXDC Super Glide Custom Base 2012\u003cbr\u003e\nHarley Davidson FXDC Super Glide Custom Base 2013\u003cbr\u003e\nHarley Davidson FXDC Super Glide Custom Base 2014\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2008\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2009\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2010\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2011\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2012\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2013\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2014\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2015\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2016\u003cbr\u003e\nHarley Davidson FXDF Fat Bob Base 2017\u003cbr\u003e\nHarley Davidson FXDFSE CVO Dyna Fat Bob Base 2009\u003cbr\u003e\nHarley Davidson FXDL Dyna Low Rider Base 2007\u003cbr\u003e\nHarley Davidson FXDL Dyna Low Rider Base 2008\u003cbr\u003e\nHarley Davidson FXDL Dyna Low Rider Base 2009\u003cbr\u003e\nHarley Davidson FXDL Dyna Low Rider Base 2014\u003cbr\u003e\nHarley Davidson FXDL Dyna Low Rider Base 2015\u003cbr\u003e\nHarley Davidson FXDL Dyna Low Rider Base 2016\u003cbr\u003e\nHarley Davidson FXDL Dyna Low Rider Base 2017\u003cbr\u003e\nHarley Davidson FXDL Low Rider Base 2014\u003cbr\u003e\nHarley Davidson FXDL Low Rider Base 2015\u003cbr\u003e\nHarley Davidson FXDL Low Rider Base 2016\u003cbr\u003e\nHarley Davidson FXDL Low Rider Base 2017\u003cbr\u003e\nHarley Davidson FXDLS Low Rider S Base 2016\u003cbr\u003e\nHarley Davidson FXDLS Low Rider S Base 2017\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2007\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2008\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2010\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2011\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2012\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2013\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2014\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2015\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2016\u003cbr\u003e\nHarley Davidson FXDWG Dyna Wide Glide Base 2017\u003cbr\u003e\nHarley Davidson FXS Blackline Base 2011\u003cbr\u003e\nHarley Davidson FXS Blackline Base 2012\u003cbr\u003e\nHarley Davidson FXS Blackline Base 2013\u003cbr\u003e\nHarley Davidson FXSB Breakout Base 2014\u003cbr\u003e\nHarley Davidson FXSB Breakout Base 2015\u003cbr\u003e\nHarley Davidson FXSB Breakout Base 2016\u003cbr\u003e\nHarley Davidson FXSB Breakout Base 2017\u003cbr\u003e\nHarley Davidson FXSBSE CVO Breakout Base 2013\u003cbr\u003e\nHarley Davidson FXSE CVO Pro Street Breakout Base 2016\u003cbr\u003e\nHarley Davidson FXSE CVO Pro Street Breakout Base 2017\u003cbr\u003e\nHarley Davidson FXST Softail Standard Base 2007\u003cbr\u003e\nHarley Davidson FXSTB Night Train Base 2007\u003cbr\u003e\nHarley Davidson FXSTB Night Train Base 2008\u003cbr\u003e\nHarley Davidson FXSTB Night Train Base 2009\u003cbr\u003e\nHarley Davidson FXSTC Softail Custom Base 2008\u003cbr\u003e\nHarley Davidson FXSTC Softail Custom Base 2010\u003cbr\u003e\nHarley Davidson FXSTD Softail Deuce Base 2007\u003cbr\u003e\nHarley Davidson FXSTSSE3 CVO Softail Springer Base 2009","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53943334109500,"sku":"ssc920-0100","price":515.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1865\/9007\/files\/a4800e09e3c58c2ade186d2aa5538788L.jpg?v=1785191252","url":"https:\/\/necycleshop.com\/products\/s-s-cycle-2007-bt-3-937in-x-4-3-8in-piston-set","provider":"NE Cycle Shop","version":"1.0","type":"link"}