Wilwood Caliper Piston Spring .77/1.22 ODx1.00

Wilwood Caliper Piston Spring .77/1.22 ODx1.00

Marsoni

M251S

$17.62

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

Wilwood Caliper Piston Spring .77/1.22 ODx1.00Caliper Piston Knock Back Springs. Used in low brake pedal situations due to piston knock back caused by vibration, mount or spindle flex. Part # 300 2434 (1. 22 diameter) is used with Wilwoods conventional stainless steel pistons from 1. 62 to 1. 88 diameter. Spring use in stainless pistons require a relief cut not present in earlier versions of pistons. Please check your application before ordering.

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Ran this for 5k and did oil analysis. It performed identically to Mobil 1 ESP 5w30. No issues, stayed in grade, nothing negative. That said, it was no better than ESP and wear metals were functionally the same as multiple other similar rated oils. It’s perfectly fine, but not better. It’s a great value. I wouldn’t use it for extended oil change intervals. No oil consumption noted.

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Reviewed in the United States on March 23, 2026

Verified Purchase

Carol

Boise, US

★★★★★ 5

Great oil

Size: 1 Quart Pack of 6

Love it.

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Reviewed in the United States on April 18, 2026

Verified Purchase