S&S CYCLE Breather Reed Valves for Evolution Big Twin '93-'99 – Part No. 31-2096 Transmission Covers Communication system speaker pockets are

Communication system speaker pockets are integrated into the helmet

with no modifications necessary

offering excellent safety

these parts provide a significant upgrade in both handling and aesthetics

S&S CYCLE Breather Reed Valves for Evolution Big Twin '93-'99 – Part No. 31-2096 Transmission Covers Communication system speaker pockets areBreather Reed Valves Crankcase Standard Evolution Big Twin '93 '99 The S&S CYCLE Breather Reed Valves (Part No. 31 2096) are designed to enhance the performance of your Evolution Big Twin engine from 1993 to 1999. Unlike traditional breathers that depend on crankshaft rotation to operate, these innovative reed valves open and close automatically based on pressure differentials within the engine. When crankcase pressure exceeds cam chest pressure, the