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Aftermarket SeaDoo Exhaust Manifold Gasket Kit Includes 3 Gaskets OEM Part Numbers: 420950253 and 420850638

  • $ 795


JSP Manufacturing® Aftermarket Seadoo Exhaust Manifold Gasket Kit

Our JSP Brand Aftermarket Sea Doo Exhaust Gasket Kit 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.

  • New Aftermarket Exhaust Manifold Gasket Kit
  • Compatible with SeaDoo
  • OEM quality aftermarket replacement part
  • Exact item is pictured
  • Quantity: 1 kit

Kit Includes: 3 Gaskets Total
1 - Head Pipe Gasket - OEM # 420931503
2 - Manifold Gaskets - OEM # 420850638

Replaces the following Part Numbers:
Head Pipe Gasket Replaces OEM Part #:
420950253
290950253
290950250
290950251
293200019
SBT #: 41-102-04
WSM #: 007-553

Manifold Gasket Replaces OEM Part #:
420850638
290850638
290850637
SBT #: 41-103-03
WSM #: 007-544

Brand: JSP Manufacturing®
MPN: GK-EX-KIT-420950253+TWO-of-420850638

Aftermarket Part fits the following Years, Make & Models:
Seadoo PWC:
1997-2001 GS
1997 - 1998 GSI
1996 - 2005 GTI
2002 - 2004 GTI LE
1992 - 2001 GTS
1992 - 1995 GTX
1995 - 1997 HX
1992 - 1998 SP
1992 - 1996 SPI
1993 - 1997 SPX
1992 - 1995 XP
1994 XPI

Seadoo Jet Boat:
1998-2001 Challenger 720
1993 Explorer 580
1994-1996 Explorer 650
1997, 2002 Explorer 720
1994-1995 Speedster 650
1996-1999 Speedster 720
1999 Speedster SK
1995 Sportster 650
1996-2000 Sportster 720
1998-1999 Sportster 1800
2002 Sportster L

**Please verify part number 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.


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