Sparco RW-4 Fire Resistant Racing Underpants - FIA 8856-2018 Size:Medium and a progressive torque curve

and a progressive torque curve

An internal mesh pocket is perfect for small items such as earbuds

It is a very good rear compound for touring car applications in combination with RS 14 front pads

The Coolshirt Male Hose Connector is a single CPC quick disconnect fitting with 1/4" thread

Sparco RW-4 Fire Resistant Racing Underpants - FIA 8856-2018 Size:Medium and a progressive torque curveSparco's entry level RW 4 line of underwear is optimized for both comfort and protection while maintaining a budget price. Using Sparco's classic soft touch fire resistant fabric, the regular fitting long underpants are comfortable for all body types and offers excellent breathability.