BlackTrax has taken their H-series intake manifold solution to another level and directly to you. Constructed from a high heat resistant polymer, the Patent Pending BlackTrax IMS acts as a thermal insulator, IAB delete and plenum spacer. These spacers and the ports within are fully CNC machined and blueprinted to match OEM plenum gaskets for optimal flow. You have the choice to: 1) replace your stock spacer 2) stack one BT IMS over your OEM spacer or 3) double stack with two BT IMS. Install time is about 30-45 minutes for the moderately experienced. Works with naturally aspirated and forced induction applications.