Phenolic Spacer - BMP Manifold 1/2"

The Precision Raceworks Phenolic Spacer is a USA-made, premium fiber phenolic material designed to insulate between hot and cold parts, improving engine performance by reducing intake air temperature.

• The description claims that the spacer reduces heat transfer and intake air temperature, which can reduce the chance of detonation.
• The description claims that the spacer works without stud extensions for many performance manifolds.