SKU: 33688861047

PRP 1/2 Inch Head and OEM Head Dowels - Nissan RB

Sale price$74.53 Regular price$82.81
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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

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Description

PRP 1/2 Inch Head and OEM Head Dowels - Nissan RB1 2 inch head dowels Anyone fitting half inch head studs to an RB (should be all rb25 and 30 blocks) They suit OEM replacement also. Need these! We have recently discovered that many people dont use dowels when converting to 1 2 inch head studs, they are absolutely crucial to stop the head from walking around and hurting your gasket seal! The reason you cant run an RB26 type M12 12 mm Stud in an RB20, 25, or 30 is because they are originally 11mm

1/2 inch head dowels

Anyone fitting half inch head studs to an RB (should be all rb25 and 30 blocks)  They suit OEM replacement also.

Need these!

We have recently discovered that many people don’t use dowels when converting to 1/2 inch head studs, they are absolutely crucial to stop the head from walking around and hurting your gasket seal!

The reason you can’t run an RB26 type M12 / 12 mm Stud in an RB20, 25, or 30 is because they are originally 11mm thread, And if you drill it out and tap half-inch UNC you need around .7 mm per side of the material to tap through to form a reliable thread.

End result with 12mm thread is that you end up with roughly .4mm at best, threads do pull being grey cast, then you have to pull your whole engine down again and fix the problem but once you have gone and pulled the stud thread through, you have to go to 9/16 which is too big or helicoil/ threadsert.

We see it happen all the time so please don’t risk it and just go a 1/2 inch stud, use these dowels problem solved.

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SKU: 33688861047

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4.5 ★★★★★
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ScottM
Fort Morgan, US
★★★★★ 5
Simply great shirt!
Size: XX-Large, Color: Dark Grey
Thank you Maelreg for creating a super soft, comfortable and affordable golf shirt for us to wear!! These are great, look great and feel even better. I can't wait to add more to my rotation.
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Reviewed in the United States on May 18, 2026
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Gerald V.
Draper, US
★★★★★ 5
Nice golf/dress shirt with extra length
Size: XX-Large, Color: Blue
Very nice golf and dress shirt. I don't like "polo" shirts with collars so I was looking for something different but I normally wear a tall. These are nice quality with great color and they have the extra length. Fabric is thin but nice and moisture wicking. Very comfortable with a loose fit. My normal size is XL tall but I ordered this in 2XL and it fits just like my XL tall shirts. I have two of them and will order more since they have a variety of colors. Great for golf or a little dressy for out on the town. Seems well made.
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Reviewed in the United States on July 22, 2025
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rob
Dallas, US
★★★★★ 4
Very nice shirt
Size: 3X-Large, Color: Olive Green
Good quality nice shirt. True fit
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Reviewed in the United States on April 22, 2026
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Mountain West Bob
Cuba, US
★★★★★ 5
Excellent Purchase - perfect fit and finish
Size: X-Large, Color: White
Great construction and fit. Plenty long (ordered XL). A bit larger than expected, might have been OK to order this in Large. Very stretchy but sleek in appearance. White is almost luminous, it's so bright. This will be a new "go to" brand for golf shirts.
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Reviewed in the United States on April 2, 2026
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Frank T.
Boise, US
★★★★★ 3
Comfortable, but shows sweat very easily.
Size: Medium, Color: Beryl Green
Very comfortable, but unfortunately you sweat right through it. Stains are visible almost immediately.
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Reviewed in the United States on July 1, 2025

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