CSF Porsche 991 GT2 RS Twin Intercooler SetThe CSF by PWR 991 GT2 RS Twin Intercooler Set features Formula 1 grade cores which offer the greatest reduction in IATs and help eliminate heat soak. The Billet Aluminum construction offers the greatest strength and durability possible. Heavy duty bar & plate core construction All aluminium cast endtanks High Density internal external fin design for maximum surface area contact and high performance cooling efficiency Drop in fit requiring no