The G4S-6765 is our latest offering in our G4 series of turbochargers for the Buick GN and T-Type. The 67mm is rated at 850+ HP and has great spool characteristics along with incredible efficiency, making it perfect for the customer that is looking for a quick responding and powerful turbocharger. Works great with pump gas, but even better with E85/Alky Injection or Race Gas. We offer this model with 2 different exhaust housings to suit your specific modifications and needs. The 65mm turbine wheel is perfect for the moderately modified car, pair it with a 3000 converter, ported heads and a mild cam for best results. Each unit is built with our Ceramic Ball Bearing system for fast spool and increased thrust load capacity. Need help deciding which model is best for you? Give us a call and we will put our 25+ years of Buick knowledge to WORK for you!