2" X 90 Magnum Valve Seat Wheels MKW-3990

(No reviews yet) Write a Review
In Stock
Calculated at checkout
Buy in bulk and save

2" X 90° Magnum Valve Seat Wheels MKW-3990

Part#: MKW-3990
Reference chart below for more details of part# above.


Only available from Regis.

This revolutionary new stone compound aggressively grinds hard seats — even those hard-to-grind late model Cummins. Grinds and finishes in one operation! No need to change stones to finish a seat. Available for Sioux and Kwik-Way.

*Order 50 or more Valve Seat Wheels, take 10% off.

See Chart below for complete list of other Magnum Valve Seat Wheels

  SX Sioux, ETC.
  11/16”-16 thread
  Fits Sioux, K.O. Lee, Thor, Skilsaw, Keystone, Winona
    KW Kwik-Way
  13/16”-13 thread
  Fits Kwik-Way


Diameter 45° 90°   90°  
1-1/8" MSX-3C MSX-390C   MKW-390C  
1-3/16" MSX-3A MSX-390A   MKW-390A  
1-1/4" MSX-3 MSX-390   MKW-390  
1-5/16" MSX-3B MSX-390B   MKW-390B  
1-3/8" MSX-9 MSX-990   MKW-990  
1-7/16" MSX-9A MSX-990A   MKW-990A  
1-1/2" MSX-15 MSX-1590   MKW-1590  
1-9/16" MSX-15A MSX-1590A   MKW-1590A  
1-5/8" MSX-21 MSX-2190   MKW-2190  
1-11/16" MSX-21A MSX-2190A   MKW-2190A  
1-3/4" MSX-27 MSX-2790   MKW-2790  
1-13/16" MSX-27A MSX-2790A   MKW-2790A  
1-7/8" MSX-33 MSX-3390   MKW-3390  
2" MSX-39 MSX-3990   MKW-3990  
2-1/8" MSX-45 MSX-4590   MKW-4590  
2-1/4" MSX-51 MSX-5190   MKW-5190  
2-3/8" MSX-57 MSX-5790   MKW-5790  
2-1/2" MSX-63 MSX-6390   MKW-6390  
Write a Review

This product hasn't received any reviews yet. Be the first to review this product!

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.