Wilwood
Wilwood Caliper Piston Spring 37/.72 OD x 1.00
SKU: W00B 300-12995
Description
Part #: 300-12995
Caliper Piston Knock Back Springs. Used in low brake pedal situations due to piston knock back caused by vibration, mount or spindle flex. Part # 300-12995 (.72a diameter) is used with all Wilwood Thermlock pistons and Wilwooda (TM)s conventional stainless steel pistons from 1.00a to 1.38a diameter. Spring use in stainless pistons require a relief cut not present in earlier versions of pistons. Please check your application before ordering.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Wilwood |
| Part Number | W00B 300-12995 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy