PPE 4.0" to 3.5" Silicone Reducer - 5-Ply (Universal)

This is a PPE silicone reducer that steps 4.0" ID down to 3.5" ID across a 5" length, built with 5-ply reinforcement and a 6mm wall. It is a universal coupler for transitioning between the two pipe sizes.

The reducer makes a clean size change in charge-air or intake plumbing, and the reinforced silicone holds up to boost and heat. The 5" length leaves plenty of surface to clamp both ends.

Larger charge pipes on high-airflow builds commonly step between 4.0" and 3.5", and this reducer handles that transition without fabrication or adapters.

Match each end to its tube OD and clamp securely. Hose only – clamps and tubing are sold separately.

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