Product Code: 90-23-28-OS
Availability: In Stock
Price: $164.95
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90-23-28-OS Intake Housing with OS Valve Guide.  (for Competition .285" valves) (1 Piece)

This is for 1 Valve Pocket with valve guide installed and the valve seat cut. 

The locating pin for the tower is installed in the valve pocket.

*** The valve guide is honed to fit OUR Valves, which measure .285".
** We now have complete pocket assemblies that are ready to run**

Fits 1923 to 1925 DCA & DCB Motors

Fits 1926-1929 FD & JD's

Fits 1928 - 1929 74" H Motors

Fits front or rear.

Sold Each.

OD - 2.372"   Height - 1.300"

(this part replaces parts 90-23 and 90-28)


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Welcome to our new website

Welcome to our new web site! We are located in the heart of the Black Hills in Sturgis, South Dakota where we specialize in Harley Davidson® Pre 1936 and other models such as Indian, Flying Merkel, and other custom manufactured products.

We have been manufacturing antique motorcycle products in the USA for over 30 years. We have a customer base of collectors and restorers that spans all over the world. Our goal is Quality, Correct Products with First Class Service.

If you wish to look at the products we manufacture, click on Catalog (at the top of the page). If you wish to purchase from our catalog, you must Create an Account.

You can visit OUR SHOP to see pictures of our facility, motorcycles, parts, and machine shop.

Contact Us



3570 Mayer Ave. Ste A, Sturgis, SD 57785

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Competition Distributing 2013,
3570 Mayer Ave. Ste A, SD 57785, Ph.605-720-1903