Free Shipping.

Expert Service.

Call 888-575-6570

S&S 106" Big Bore Cylinder Kit

Item: 339291

$1043.96 – $1061.96

Select Your Vehicle - Fitment Guaranteed

S&S 106" Big Bore Cylinder Kit


With no need to rebalance flywheels, bore crankcases, or bore cylinders, this kit is about as easy as it gets. Consisting of the largest bore we feel can safely be used in a cylinder with a stock spigot diameter, this kit brings a new definition to the term 'big bore'.

Features and Benefits:

  • Bolt-on 9 to 10 cubic inches, cylinders do not require crankcase machining to install
  • Piston weights are the same as stock, requiring no flywheel rebalancing
  • Forged coated pistons are compatible with stock or S&S Super Stock 89cc heads
  • Valve pocket recessed in S&S pistons are enlarged for oversize valves and higher lift cams
  • Compression Ratio (when used with stock cylinder heads): 10.0:1
  • Compression Ratio (when used with S&S 89cc cylinder heads): 9.7:1

Kit Contents:

  • Piston set with rings
  • Top end gasket kit
  • S&S cylinders
  • Instructions
Specification Details
Bore 3.927 in.
Color Varies (make selection above)
Compression Ratio 10.0:1/9.7:1
Country of Origin USA
Displacement 106 CI
Engine Type Twin Cam
Finish Powder Coated
Material Aluminum
Piston Type Forged Flat Top
Stroke 4-3/8 in.

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Harley Davidson
  • FLD Dyna Switchback 2012-2016
  • FLHR Road King 2007-2016
  • FLHRC Road King Classic 2007-2013
  • FLHRS Road King Custom 2007
  • FLHT Electra Glide Standard 2007-2009
  • FLHTC Electra Glide Classic 2007-2013
  • FLHTCU Ultra Classic Electra Glide 2007-2016
  • FLHTCUL Electra Glide Ultra Classic Low 2015-2016
  • FLHTK Electra Glide Ultra Limited 2010-2016
  • FLHTKL Electra Glide Ultra Limited Low 2015-2016
  • FLHX Street Glide 2007-2016
  • FLHXS Street Glide Special 2014-2016
  • FLS Softail Slim 2012-2017
  • FLSS Softail Slim S 2016-2017
  • FLSTC Heritage Softail Classic 2007-2017
  • FLSTF Softail Fat Boy 2007-2017
  • FLSTFB Softail Fat Boy Lo 2010-2016
  • FLSTFBS Softail Fat Boy S 2016-2017
  • FLSTN Softail Deluxe 2007-2017
  • FLSTSB Softail Cross Bones 2008-2011
  • FLSTSC Softail Springer Classic 2007
  • FLTR Road Glide 2007-2009
  • FLTRU Road Glide Ultra 2011-2013, 2016
  • FLTRX Road Glide 2015-2016
  • FLTRX Road Glide Custom 2010-2013
  • FLTRXS Road Glide Special 2015-2016
  • FXCW Softail Rocker 2008-2009
  • FXCWC Softail Rocker C 2008-2011
  • FXD Dyna Super Glide 2007-2010
  • FXDB Dyna Street Bob 2007-2017
  • FXDBC Dyna Street Bob Limited 2016
  • FXDBP Dyna Street Bob 2016
  • FXDC Dyna Super Glide Custom 2007-2014
  • FXDF Dyna Fat Bob 2008-2017
  • FXDL Dyna Low Rider 2007-2009, 2014-2017
  • FXDLS Dyna Low Rider S 2016-2017
  • FXDWG Dyna Wide Glide 2007-2008, 2010-2017
  • FXS Softail Blackline 2011-2013
  • FXSB Softail Breakout 2013-2017
  • FXST Softail Standard 2007
  • FXSTB Softail Night Train 2007-2009
  • FXSTC Softail Custom 2007-2010
  • FXSTD Softail Deuce 2007

Customer Reviews

Write Review

Be the first to review this product. How many stars would you give this product?

Questions & Answers

Ask Question

Break in

With your piston and ring manufacturers how do you renamed braking in and what oil is required for your brake in time??

The break-in procedure is outlined below. As always, check for leaks after every ride. 1. Initial start up. Run the engine approximately one minute at 1250-1750RPM. Shut down, allow engine to cool to the touch. 2. Start again and allow warm up for 3 to 4 minutes Shut down, allow engine to cool to the touch. Repeat 3 more times 4. Ready to start the 500 mile engine break-in process: Keep heat down by not exceeding 2500 RPM Avoid lugging, hot weather and traffic Vary the engine speed Change oil after the first 50 miles 5. Next 500 miles should be spent running no faster than 3500rpm or 60mph and same rules as step Change oil after the 500 miles 6. Remaining 1000 miles, run more of the same, but more liberal with RPM and operate at normal highway speeds Change oil after the 1000 miles 7. Enjoy more power, fully!

By Tom
Answer Question

Have a question? Please ask our experts and customers who own this product.

Ask Question