MARTIN 40BS18-1-1/8

Marsoni

M251S

$164.00

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

MARTIN 40BS18-1-1/840BS18118 DISCONTINUED BY MANUFACTURER ROLLER CHAIN SPROCKET STANDARD STOCK NO. 40 CHAIN 1 2 INCH PITCH TYPE BS BORED TO SIZE 1 1 8 INCH BORE DIAMETER 18 TEETH 1 INCH LENGTH THRU BORE STEEL

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I used this to change the oil on my BMW M8 with the S63 engine. It was a perfect fit. It extended far enough onto the filter housing to be quite secure with no risk of slipping off and stripping the housing. It was snug on the housing and did not bind up due to having a loose fit. The tool feels well-built and I suspect it will outlive me given my occasional personal use. It would still probably hold up well even for daily shop use as long as it was not abused (repeatedly dropped, slammed around, etc).

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Reviewed in the United States on September 8, 2025

Verified Purchase

Chad altenbach

Massapequa, US

★★★★★ 5

Made well and great fit

Fits perfectly and is made well

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Reviewed in the United States on May 8, 2026

Verified Purchase

Dalia Toppin