Schaefer Single Aluminum Block - 51mm Sheave - 504-05

Schaefer Single Aluminum Block - 51mm Sheave - 504-05

Marsoni

M251S

$66.99

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

Schaefer Single Aluminum Block - 51mm Sheave - 504-05Single Aluminum Block 51mm Sheave Single block with anodized aluminum cheeks. Delrin sheave ensures smooth operation with high safe working load. Swivel head may be locked in place to avoid twist. Specifications: Sheave Dia. 2" (51mm) Thickness 15 16" (24mm) Width 2 1 8" (54mm) Length 4 13 32" (112mm) SWL 1750 lbs. (795kg) Weight 5oz. (142g) Max. Line size 7 16" (11mm)

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Got this to replace cabin air filter on 2020 Honda Civic Sport, as it said it was a direct fit… It does fit but not perfectly! Holding it next to the filter you can see the size difference, with the original being slightly longer. I noticed a whistling sound from the AC at full blast right after install. I believe this noise is caused by the small gap left in the retainer box with the slightly smaller filter. Luckily it is not incredibly loud, but it’s still there. The quality of filtration seems to be much better than stock filter, but the fitment not exact for vehicles mentioned above.

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Reviewed in the United States on May 17, 2026

Verified Purchase

Bon43

Alexandria, US

★★★★★ 5

Awesome

Easy to install. Fit appropriately. Value for the money for sure.

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Reviewed in the United States on September 26, 2025

Verified Purchase

tprizzle

Grantham, US

★★★★★ 5

Will continue to repurchase

I have purchased this product multiple times for my Honda CRV. Works great and is actually pretty easy to install. I will definitely repurchase once the time comes to replace again. Great value for the price compared to at the dealership

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Reviewed in the United States on June 1, 2025