Box Three Q/R Seat Clamp

Marsoni

M251S

$15.95

Get it in 3 business days with 1 day shipping. Friday, May 29

Box Three Q/R Seat ClampBox Three Quick Release Seat Clamps are cold forged and CNC machined from 6061 T6 aluminum alloy. The head of the lever and the face of the clamp are given a proprietary low friction surface treatment that ensures smooth lever action for the life of the clamp without the need for a bushing. 25. 4mm for 22. 2mm post Diameter 25. 4mm (22. 2mm post) Material 6061 T6 Aluminum Weight 14 grams 0. 5 ounces

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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The part appears decently made in China. The end that terminates below the oil filter would not mount (too tight). I gently sanded the o-ring groove, lubricated and I put the part in freezer. After two hours of sanding the groove I got the part seated. Good thing I was patient today. Pain in the butt.

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Reviewed in the United States on December 12, 2020

Verified Purchase

Man with plan

Los Angeles, US

★★★★★ 5

Highly recommend

Perfect fit for my Mercedes C300 V6

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Reviewed in the United States on March 1, 2026

Verified Purchase

kip wargo