GATES Drive Belt 40R3691

If you're running a high-performance platform that demands precision power delivery, belt slippage and heat degradation will kill your acceleration and consistency. The GATES Drive Belt 40R3691 is engineered to handle the rapid torque spikes and extreme thermal conditions of modern forced-induction and high-output engines, delivering the stiffness and reliability you need for repeatable performance whether you're on the track or the dyno.

Built with GATES' fiber-reinforced EE elastomer compound, this belt maintains structural integrity at temperatures up to 338°F while reducing parasitic speed losses by 50%—meaning more of your engine's power actually reaches your accessories. The high-tensile aramid cord layer and specially-formulated adhesion gum resist shock loads during hard acceleration, extending service life and preventing the premature wear that comes with aggressive driving.

• Fiber-reinforced EE elastomer compound
• 75% improved dynamic axial stiffness
• 50% lower speed losses
• Operating range to 338°F
• High-tensile aramid cord layer
• Enhanced shock load resistance
• Fabric cog jacket design
• Smooth, reliable shifting
• Chlorine-free construction
• MPN: 40R3691