Zipper’s Extreme Stage 3 107″ Big Bore Kit for 2007-2016 Harley Touring Models and Softails

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$2,599.00

 

Zipper’s Stage 3 Extreme 107″ Big Bore Kit Twin Cam Bolt-On Big Bore Kit is a reliable way to increase power and torque on your 2007-2016 96″/103″ Twin Cam engine. This is a complete kit that includes heads, cylinders, pistons, manual decompression valves, gaskets and ring set. Cycle Solutions keeps as many kits in stock as possible. Some kits can be shipped immediately and some may need to be manufactured.. As a result, we keep you on the road and not sitting in the shop. A core exchange is required on the cylinders and heads on this kit.  Reach out to us if you would like to know if a kit is in stock or once ordered we will reach out to you.

Fitment: 2007-2016 96″ or 103″ FL Touring models and Softails

Cycle Solutions Inc. offers installation and dyno tuning at our two shop locations and at the events we attend for an additional cost of $1400.00. If you are interested in having this kit professionally installed and dyno tuned or have questions about this kit them please reach out to us.

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Description

Factory 2007-2016 Twin Cam® engines are equipped with 4-3/8” stroke crankshafts. The factory cylinder bore size of 3-3/4” yields the 96” displacement, which was gradually increased to 3-7/8” starting in 2010 for 103” displacement. We can turn your 96” engine into either a 103 or a 107”, and your 103 into a 107” simply by resizing the factory cylinders. This kit was built for extreme performance and designed for a 577 Zippers Red Shift Cam and an upgraded throttle body.

This kit includes CNC ported heads, bored cylinders, pistons and ring set.   A core exchange is required.  Click here for core exchange information.  This kit can be modified for additional performance parts by reaching out to us.

Cycle Solutions Inc offers installation and dyno tuning at our two shop locations and at the events we attend for an additional cost of $1400. If you are interested in having this kit professionally installed and dyno tuned or have questions about this kit then please click below.

Fitment: 2007-2016 96″ or 103″ Twin Cam engines

Heads:

  • Advanced port and valve designs
  • Special ductile-iron step-lock valve guides
  • 5/16” stem 1.900” / 1.630” stainless steel valves with severe duty coatings
  • Performance valve springs for .580” lift standard* (*Optional springs available for higher lift applications)
  • Fully machined 91cc** combustion chamber un-shrouds valves for increased flow (** 84cc on Twin Cooled® heads)
  • Decked heads to raise compression
  • Manual decompression valves

 

Cylinders & Pistons:

  • 3.937” (107”) Big Bore Cylinder Kit
  • Forged 10.25:1 compression ratio flat-top pistons (-1.5cc)
  • Cometic Gasket Kit C9588

To get the most performance out of this kit it must be paired with the proper supporting products. We recommend a high cranking amp battery, a stepped exhaust system, Hi flow air intake, Thundermax Auto tune, a red shift 577 chain drive cam, 58mm-62mm CSR throttle body5.3 GPS Injectors and our S&S Roller Rocker Upgrade Kit.

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