Manufactured in-house from 4140 steel, this drum will be a must for pro-street transmissions.  This drum helps prevent the violent explosion that occurs when the over-running clutch (the sprag) fails.  This offers more protection than the stock drum, without the service intervals of the aluminum drum. 

Spin testing is the most reliable way to evaluate stresses of an object as it is turning.  We had a stock drum tested and it failed at 12,840 RPM.  We had our competition's tested and it began to fail at 18,000 RPM.  Then, we had our drum tested and it went to 32,000 RPM without failure.