WATER PUMP COVER 03-15 WR450F, SUPERCOOLER BOYESEN WPK-38B
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
Supercooler Water Pump Cover and Impeller Kit WPK-38B in black. Designed to increase coolant flow at all RPM ranges. Features a patented Nautilus-style impeller for hydrodynamic efficiency and a hard powder coat finish.
- SKU
- 05-072.BK
- Brand
- Boyesen
- Availability
- In Stock (2)
Fitments (36)
| Make | Model | Year |
|---|---|---|
| YAMAHA | WR 426F | 2000 |
| YAMAHA | WR 426F | 2001 |
| YAMAHA | WR 426F | 2002 |
| YAMAHA | WR 450F | 2003 |
| YAMAHA | WR 450F | 2004 |
| YAMAHA | WR 450F | 2005 |
| YAMAHA | WR 450F | 2006 |
| YAMAHA | WR 450F | 2007 |
| YAMAHA | WR 450F | 2008 |
| YAMAHA | WR 450F | 2009 |
| YAMAHA | WR 450F | 2010 |
| YAMAHA | WR 450F | 2011 |
| YAMAHA | WR 450F | 2012 |
| YAMAHA | WR 450F | 2013 |
| YAMAHA | WR 450F | 2014 |
| YAMAHA | WR 450F | 2015 |
| YAMAHA | YFZ 450 | 2004 |
| YAMAHA | YFZ 450 | 2005 |
| YAMAHA | YFZ 450 | 2006 |
| YAMAHA | YFZ 450 | 2007 |
| YAMAHA | YFZ 450 | 2008 |
| YAMAHA | YFZ 450 | 2009 |
| YAMAHA | YFZ 450 | 2010 |
| YAMAHA | YFZ 450 | 2011 |
| YAMAHA | YFZ 450 | 2012 |
| YAMAHA | YFZ 450 | 2013 |
| YAMAHA | YZ 426F | 2000 |
| YAMAHA | YZ 426F | 2001 |
| YAMAHA | YZ 426F | 2002 |
| YAMAHA | YZ 450F | 2003 |
| YAMAHA | YZ 450F | 2004 |
| YAMAHA | YZ 450F | 2005 |
| YAMAHA | YZ 450F | 2006 |
| YAMAHA | YZ 450F | 2007 |
| YAMAHA | YZ 450F | 2008 |
| YAMAHA | YZ 450F | 2009 |
- General Colour C
- Black
- General Product Group
- Cooling Systems & Parts
- General Product Type
- Water Pump Cover
- Variant Id
- 207996
FULL DESCRIPTION
Boyesen Supercooler Water Pump Cover and Impeller Kit - Black
Upgrade your motorcycle's cooling system with the Boyesen Supercooler Water Pump Cover and Impeller Kit. This performance-engineered kit is designed to significantly improve coolant flow across all RPM ranges, ensuring your engine runs cooler and more efficiently.
The kit features Boyesen's patented Nautilus-style impeller, engineered for maximum hydrodynamic efficiency. This innovative design helps to move coolant more effectively, reducing the risk of overheating during demanding rides.
Finished with a durable, hard powder coat in black, this water pump cover not only enhances performance but also adds a sleek, custom look to your motorcycle. Trust Boyesen for quality and performance-driven parts.
- Increased Coolant Flow: Engineered to boost coolant circulation at all RPM levels.
- Patented Impeller Design: Features the Nautilus-style impeller for superior hydrodynamic efficiency.
- Durable Finish: Comes with a robust hard powder coat for longevity and style.
- Color: Black.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.