---
product_id: 36319969
title: "Sea Doo 787 800 951 Exhaust Water Box Bellow 420260721 XP SPX GSX GTX LRV RX"
brand: "titan 757 performance"
price: "¥6289"
currency: JPY
in_stock: true
reviews_count: 2
url: https://www.desertcart.jp/products/36319969-sea-doo-787-800-951-exhaust-water-box-bellow-420260721
store_origin: JP
region: Japan
---

# Water Resistant Precision Fit OEM Quality Sea Doo 787 800 951 Exhaust Water Box Bellow 420260721 XP SPX GSX GTX LRV RX

**Brand:** titan 757 performance
**Price:** ¥6289
**Availability:** ✅ In Stock

## Summary

> 🚤 Dive into Performance with Confidence!

## Quick Answers

- **What is this?** Sea Doo 787 800 951 Exhaust Water Box Bellow 420260721 XP SPX GSX GTX LRV RX by titan 757 performance
- **How much does it cost?** ¥6289 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/36319969-sea-doo-787-800-951-exhaust-water-box-bellow-420260721)

## Best For

- titan 757 performance enthusiasts

## Why This Product

- Trusted titan 757 performance brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Installation:** Get back on the water in no time with straightforward setup.
- • **Durable Construction:** Engineered for longevity and performance under pressure.
- • **Enhanced Performance:** Optimized for superior exhaust flow and efficiency.
- • **Aftermarket Excellence:** OEM quality at a fraction of the cost.
- • **Unmatched Compatibility:** Seamlessly fits a wide range of Sea-Doo models.

## Overview

The Sea Doo 787 800 951 Exhaust Water Box Bellow (Part# 420-260-721) is an OEM quality aftermarket replacement designed specifically for various Sea-Doo models from 1996 to 2005. This durable and water-resistant bellow ensures a precise fit, enhancing your watercraft's performance while providing an easy installation experience.

## Description

NEW SEA-DOO WATER BOX BELLOW OEM quality replacementThis is the bellow for the water box onlyFits all Sea-Doo 787 / 951 models Exact item pictured ReplacesOEM 420-260-721 FITS: SEA-DOOGSX 1996-1998GSX RFI 1999-2000GSX Limited 1997-1999GTX 1996-2002GTX RFI 1998-2002GTX Limited 1998-1999GTX DI 2000-2003GTI LE RFI 2003-2005GTI RFI 2004-2005SPX 1997-1999XP 1996-2002XP Limited 1998-1999XP DI 2003-2004LRV / LRV DI 2000-2003RX / RX DI 2000-2003

## Features

- OEM quality aftermarket replacement parts
- Exact item you will receive is pictured
- This bellow is for the Water Box Only
- Replaces Sea-Doo Part# 420-260-721
- FITS: SEA-DOO GSX 1996-1998 / GSX RFI 1999-2000 / GSX Limited 1997-1999 / GTX 1996-2002 / GTX RFI 1998-2002 / GTX Limited 1998-1999 / GTX DI 2000-2003 / GTI LE RFI 2003-2005 / GTI RFI 2004-2005 / SPX 1997-1999 / XP 1996-2002 / XP Limited 1998-1999 / XP DI 2003-2004 / LRV / LRV DI 2000-2003 / RX / RX DI 2000-2003

## Images

![Sea Doo 787 800 951 Exhaust Water Box Bellow 420260721 XP SPX GSX GTX LRV RX - Image 1](https://m.media-amazon.com/images/I/61zXZaFUvkL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Works, but I had a few complications.
  

*by G***N on Reviewed in the United States on June 29, 2020*

On a 1997 Sea Doo Challenger, same engine as an XP PWC.Seemed to be stiffer than the original, and did not function the same. I was getting almost no flow at idle it open throttle, which burned up the coupler hose. The pipe got to 538°! The paint was starting to smoke! I had to back out the valve screw in the water valve 5 turns in order to tune the flow to 0.4 gpm at full throttle, which I measured by installing a $29 Amazon-sold 0.1-1.0 gpm flowmeter between the water valve and the tuned exhaust cone. Loctite now keeps that valve screw in place 5 turns out from seated.It is possible that my water valve had other issues, but it works great now. 0.4 gpm at full throttle, just under 0.1 gpm at idle. Pipe doesn't get above 150° now, measured with an infrared thermometer, and by laying my hand on it for a few seconds.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    96 XP. not like the originals but it works
  

*by M***S on Reviewed in the United States on September 9, 2022*

So far so good after a season. But it was not like the original.

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**Shop now:** [https://www.desertcart.jp/products/36319969-sea-doo-787-800-951-exhaust-water-box-bellow-420260721](https://www.desertcart.jp/products/36319969-sea-doo-787-800-951-exhaust-water-box-bellow-420260721)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-24*