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Wiseco W6378 Top End Gasket Kit HD 883/1200 Sportster Big Bore 3.518 in. Bore

(Harley-Davidson XL1200C Sportster 1200 Custom 2004-14, XL883N Iron 883 2009-22, XL883 Sportster 2004-09, XL1200R Sportster 1200 Roadster 2004-08 + 6 more models)

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

W6378
10 reviews
Sale Price

$143.99

Estimated ship date Friday, November 20

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Product Details

The Wiseco W6378 is a top end gasket kit engineered specifically for Harley-Davidson 883/1200 Sportster big bore applications with a 3.518-inch bore. Designed to complement Wiseco's forged big bore piston kits, this gasket set provides all the sealing components needed for a reliable top end rebuild or displacement upgrade.

Key Features:

  • Purpose-built for HD 883/1200 Sportster big bore conversions ('04–'11)
  • 3.518 in. bore diameter to match Wiseco oversize piston kits
  • Sourced in-house from high-quality, vetted suppliers for consistent performance
  • Engineered to meet or exceed OEM sealing specifications
  • Compatible with Buell applications sharing the same platform
  • Gasket content optimized for the specific application — content may vary by model year

Wiseco gasket kits are designed to work seamlessly with Wiseco pistons and crankshafts, ensuring proper fitment and a critical seal throughout the top end. Whether you're performing a routine rebuild or converting an 883cc Sportster to 1200cc displacement, the W6378 delivers the sealing reliability your build demands.

Products specifications

Fits

Harley-Davidson XL1200C Sportster 1200 Custom 2004-14, XL883N Iron 883 2009-22, XL883 Sportster 2004-09, XL1200R Sportster 1200 Roadster 2004-08, XL883L Sportster 883 Low 2005-10, XL1200L Sportster 1200 Low 2006-11 + 4 more models

Thanks

Quick and easy!

Super easy and the best price!

easy

sdvSD

easy quick no add ons

its good so far i would need to see hows the shipping

Good so far

Price was unbeatable and the shipping was good for the price could not beat this deal anywhere else.

The shipping was fast, although I couldn't get it the first day because they require signature for delivery. I guess it's an added safety measure. Thank you! Will shop buy from again!

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