Our 4.5″ race intercoolers are hand crafted and pressure tested to 35 PSI. High quality Bell cores along with 2.5″ end tank piping optional for maximum flow. Our very own 4.5″ race intercooler is on some the highest HP 997TT’s dialing in at 1200 HP. They are hand crafted and pressure tested to 35 PSI. We tested these intercoolers at the track trapping 154 mph as well as running 4.2 seconds 60 to 130 mph.