MACE 6.35MM MANIFOLD INSULATOR KIT TO SUIT TOYOTA 2JZ-GTE TWIN TURBO 3.0L I6Exclusive to Mace Engineering, here we have our design registered manifold insulator to suit the Toyota vehicles fitted with 2JZ GTE 3. 0L inline 6 cylinder engine. What are manifold insulators and what do they do? Manifold insulators are a thermal insulating spacer that mount between your engine block and intake manifold. Made from a heat blocking composite, our manifold insulators will increase power from your engine by keeping the intake cooler and