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S&S 106" Big Bore Kit For Harley Big Twin 2007-2015
  • S&S 106" Big Bore Kit For Harley Big Twin 2007-2015 - Black
  • S&S 106" Big Bore Kit For Harley Big Twin 2007-2015 - Silver

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Video Reviews (2)

S&S 106" Big Bore Kit For Harley Big Twin 2007-2015 Videos

S&S Cycle 106" Big-Bore Kit For Harley Big Twin

You know the saying - "There's no replacement for displacement!"


  • Kit yields excellent results with stock cylinder heads
  • Features the largest bore (3.927") that can safely be used in a cylinder with stock spigot diameter
  • Even though stock cylinders can be bored to fit the 3.927" pistons, the included S&S cylinders feature a much stronger liner to stand up to the added power
  • Easy installation: no need to bore or split existing cases, just swap the cylinders
  • Specifications: 3.927" bore, 4 3/8" stroke, 106" displacement, 10:1 compression ratio with stock heads
  • Kits include cylinders, pistons, rings and gaskets (head, base and exhaust)
  • Black or silver powder-coat finish
  • Increased fin area for better heat dissipation
  • Valve pocket recessed in S&S pistons are enlarged for oversize valves and higher lift cams
  • Maintains stock engine height and stock piston weight
  • Made in the USA

Fitment Notes & Exceptions

  • These parts require a good deal of technical skill to install correctly - it is the responsibility of the person assembling the parts to check all clearances and assembly specifications
  • S&S highly recommends installing a performance cam for easier starting and better engine performance
  • These kits require tuning - when used on EFI models, S&S recommends the Dynojet Power Vision flash tuner

This Product Fits:
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Road Glide Custom FLTRX 2010, 2011, 2012, 2013
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Road King Classic FLHRC/I 20072013
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Rocker FXCW 2008, 2009, 2010, 2011
Softail Blackline FXS 2011, 2012, 2013
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Softail Deuce FXSTD/I 2007
Softail Slim FLS 2012, 2013, 2014, 2015, 2016
Softail Slim S FLSS 2016
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Street Glide Special FLHXS 2014, 2015, 2016
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Tri Glide Ultra Classic FLHTCUTG 20092016
Product Style RevZilla Item # Manufacturer Product # Availability
Black 958442 910-0206 In Stock: Ships within 24 hours
Silver 958443 910-0202 In Stock: Ships within 24 hours


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S&S 106" Big Bore Kit For Harley Big Twin 2007-2015
Already Asked: 1 Question
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A shopper asked: I have SE 103+ heads and want to run a 10.5 comp. can this kit be modified to come with the higher rate pistons? Mar 31, 2015
Answer this · Send to friends Good question? Yes (3) No (2)