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  See more parts for Harley-Davidson FLD Switchback
Select the year of your Harley-Davidson FLD Switchback:
Wiseco Big Bore Gasket Kit for Harley-Davidson FLRT Freewheeler 2015-2016, 4.125 in Bore - W6438

Overview

Upgrade your Harley-Davidson with the Big Bore Gasket Kit, specifically engineered for top-end performance. This complete gasket set is designed to fit a bore range of 4.125 inches, ensuring a precise seal for your engine's cylinder head. Crafted for Axtel applications, this gasket kit enhances engine reliability and optimizes overall performance, making it an essential addition for those who demand excellence from their ride.

Fitment

  • Harley-Davidson FLRT Freewheeler 2015-2016
  • Harley-Davidson FLHTCUL Electra Glide Ultra Classic Low 2015-2016
  • Harley-Davidson FLHTKL Electra Glide Ultra Limited Low 2015-2016
  • Harley-Davidson FLTRXS Road Glide Special 2015-2016
  • Harley-Davidson FLD Dyna Switchback 2012-2016
  • Harley-Davidson FLHR Road King 1999-2016
  • Harley-Davidson FLHTC Electra Glide Classic 1999-2013
  • Harley-Davidson FLHTCU Electra Glide Ultra Classic 1999-2016
  • Harley-Davidson FLHTCUSE CVO Electra Glide Ultra Classic 2006-2013
  • Harley-Davidson FLHTCUTG Tri Glide Ultra Classic 2009-2016
  • Harley-Davidson FLHTK Electra Glide Ultra Limited 2010-2016
  • Harley-Davidson FLHX Street Glide 2006-2016
  • Harley-Davidson FLHRSE CVO Road King 2002-2013
  • Harley-Davidson FLHTCSE CVO Electra Glide 2004-2005
  • Harley-Davidson FLHXSE CVO Street Glide 2010-2012
  • Harley-Davidson FLSTFSE CVO Softail Fat Boy 2005-2006
  • Harley-Davidson FLSTSE CVO Softail 2010-2011

Technical Specs

  • Gasket Position: Top End
  • Bore Range: 4.125 inches
  • Sales Conditions: For Axtel Applications

User Feedback

One customer noted, "Installed this gasket kit on my 2015 Freewheeler, and the fit was spot on. The engine runs smoother, and I can feel the difference in power delivery." Another user shared, "This gasket set made my 2016 Electra Glide Ultra Classic feel more responsive. It’s a solid upgrade for anyone looking to enhance their ride."

Closing Summary

Whether you're cruising the highway or tackling winding roads, the Big Bore Gasket Kit provides the reliability and performance that every Harley enthusiast seeks. With its precise fitment and durable construction, this gasket kit is a smart choice for maintaining peak engine performance.

Other Part Numbers:
Wiseco #W6438

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle Make/Model
Harley-Davidson FLD Switchback 2012-2016 Base
Harley-Davidson FLHR Road King 1999-2016 Base
Harley-Davidson FLHTC Electra Glide Classic 1999-2005, 2007-2013 Base
Harley-Davidson FLHTCU Electra Glide Ultra Classic 2007-2016 Base
Harley-Davidson FLHTCUL Electra Glide Ultra Classic Low 2015-2016 Base
Harley-Davidson FLHTCUSE4 CVO Ultra Classic Electra Glide 2009 Base
Harley-Davidson FLHTCUSE5 CVO Ultra Classic Electra Glide 2010 Base
Harley-Davidson FLHTCUSE6 CVO Ultra Classic Electra Glide 2011 Base
Harley-Davidson FLHTCUSE7 CVO Ultra Classic Electra Glide 2012 Base
Harley-Davidson FLHTCUSE8 CVO Ultra Classic Electra Glide 2013 Base
Harley-Davidson FLHTCUTG Tri Glide Ultra 2009-2016 Base
Harley-Davidson FLHTCUTG Tri Glide Ultra Classic 2009-2013 Base
Harley-Davidson FLHX Street Glide 2006-2016 Base
Harley-Davidson FLHXSE CVO Street Glide 2010 Base
Harley-Davidson FLRT Freewheeler 2015-2016 Base
Harley-Davidson FLSTSE CVO Softail Convertible 2010 Base
Harley-Davidson FLSTSE2 CVO Softail Convertible 2011 Base
Harley-Davidson FLTRXS Road Glide Special 2015-2016 Base

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Who is Wiseco Pistons?

Wiseco Pistons is an aftermarket company established in 1940 and started in Cleveland, Ohio when Clyde Wiseman designed to create his pistons for himself and his friends. Soon after, people started ordering the same piston and became a favorite of many motorsport enthusiasts. 

Today, Wiseco’s has become a world-renowned brand for piston and other high-performance products.

Hightech Manufacturing Facility

Over the years, the company grew and relocated its corporate headquarters in Mentor, Ohio. It now boasts over 150,000 square feet of state-of-the-art forging facility with CNC machining equipment. Wiseco also has fully stocked, strategically located distribution centers all over Canada and Europe to cater to their customers wherever they are.

Global Footprint

As an internationally acclaimed brand, Wiseco gained customers' trust in Europe, Africa, South America, Asia, and Australia. Wiseco is now considered the world leader in manufacturing hi-performance, forged pistons for motorcycles, snowmobile, motorcycle, ATV, outboard marine, and automotive markets.

Purchase Wiseco Pistons at Vivid Racing

If you search for quality pistons that would provide you with optimum performance, then Wiseco Pistons is the right brand for you. It is designed for those who want the best. With 75 years of experience under their belt, you can be sure that Wiseco Pistons is a brand you could trust. 

To know more about Wiseco Pistons and what they can offer, visit Vivid Racing and check out their list of products that would fit your specific needs.

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