Cart 0

Aftermarket Seadoo Exhaust Manifold Gasket OEM# 290850638 / 420850638 PWC Jetski 717 720 657 Jetboat Speedster

  • $ 659

JSP Manufacturing® Aftermarket Seadoo Exhaust Manifold Gasket

Please select Quantity of Gaskets needed from drop down list. The More you buy the more you save! 

Our JSP Brand Aftermarket Sea Doo Exhaust Manifold Gasket is compatible with the SeaDoo models listed below. Tested for consistent quality and meets or exceeds original OEM specifications. Please check you part number before placing an order. These gaskets are sold in multiple quantities, please select the correct quantity needed.

  • New Aftermarket Exhaust Manifold Gasket
  • Compatible with SeaDoo
  • OEM quality aftermarket replacement gasket
  • Exact item is pictured
  • Quantity: Multi-pack, quantity based on quantity selected

Replaces the following Part Numbers:
OEM Part #:
SBT #: 41-103-03
WSM #: 007-544 

Brand: JSP Manufacturing®
MPN: GK-EX-420850638

Aftermarket Part fits the following Years, Make & Models:
Seadoo PWC:
1997-2001 GS
1997 GSI
1996 - 2005 GTI
2002 - 2004 GTI LE
1995 - 2001 GTS
1995 GTX
1995 - 1997 HX
1995 - 1997 SP
1995 - 1996 SPI
1995 - 1997 SPX
1994 - 1995 XP
1994 XPI

Seadoo Jet Boat:
1998 Challenger
2000 Challenger
2001 Challenger
1997 Explorer
2002 Explorer
1994 - 1997 Speedster
1999 Speedster SK
1995 Sportster
1997 Sportster
1998 Sportster
2000 Sportster
1998 - 1999 Sportster 1800
2002 Sportster L

**Reported to fit the above listed years, makes and models, however may fit some additional years, makes and models not listed. Please verify part numbers from original unit, before ordering to help ensure fitment.

We offer a 30-Day Guarantee, if you have any issues with your item, please contact us to resolve the problem.

Return Information
Returns will be the cost of the item purchased, MINUS any shipping costs that we incurred shipping to you, or any return shipping costs. All returns must be in unused, undamaged and unaltered condition. If you have any questions regarding your return, please contact us.

Shipping Information
We guarantee that if you place the order on a business day before 2PM, it will ship out that same day.  If placed after 2PM, it will ship out the following business day. Unfortunately, once your order leaves our facility, we are unable to control delays or errors by the shipping carrier. 

Please Contact     JSP Manufacturing 

 At 727-328-8733 If you have any questions or need larger quantities.

Monday - Friday 8AM-5PM Eastern Time.

We Also Recommend