PPE 4.0" ID x 5" Performance Silicone Coupler (Universal)

This is a PPE performance silicone coupler, 4.0" inside diameter and 5" long, for joining large-diameter tubing on high-flow intake and charge-air systems. It’s a key building block for serious airflow builds.

The multi-ply silicone construction handles the heat and pressure of a boosted engine bay and keeps its shape rather than swelling under load. At 4.0", it’s aimed at high-flow turbo intake and intercooler plumbing where big piping is the norm.

Fitment is universal, so it suits any build joining 4.0" tubing – turbo intake tracts, cold-side charge piping, and intercooler routing. Fabricators building for airflow keep couplers this size on hand.

Use a proper T-bolt or lined clamp (sold separately) at each end and confirm your tube outside diameter before ordering. The coupler carries PPE’s 1-year limited warranty.

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