Direct-fit phenolic thermal spacer for B58 Gen 1 engines - bolt-on heat soak reduction between cylinder head and intake manifold.
Blocks conductive heat transfer using high-grade phenolic material
Compatible with OEM and aftermarket charge coolers & manifolds
Proven for fast road and track day use where intake air temps matter
No modifications, no tuning required - fits as standard
Works hardest when paired with an upgraded charge cooler or performance intake manifold. Not a styling part - it’s functional thermal management for drivers who notice the difference 5°C makes.
