Grams Performance 3.15in to 3.00in Silicone Reinforced Reducer Coupler for 72mm Throttle Body

This Grams Performance reducer coupler is made from fiber-reinforced silicone. It's designed to connect aftermarket intake or intercooler pipes to a Grams Performance & Design DBW throttle body. This part is useful when you need to adapt a 3.15-inch intake pipe to a 3.00-inch throttle body, like the 72mm DBW unit from Grams.

The fiber reinforcement in the silicone helps this coupler maintain its shape under pressure and temperature changes, preventing it from collapsing or expanding too much. This ensures a consistent airflow path to your engine. It's a common part used when upgrading to a larger throttle body on vehicles like the Honda Civic Si, Subaru BRZ, or Scion FR-S, allowing for a smoother transition from the intake piping.