Sonnax heavy duty reverse clutch piston kit 28761-01K for GM Powerglides is configured to utilize four frictions and five steels. It can also be machined to accept additional frictions and steels for transbrake applications. To reduce rotating weight in circle track applications, two frictions (rotating) and seven steels (non-rotating) can be used.

• High-strength piston will not break at racing pressures
• Customizable for any application