I have a 8 inch PTC converter for sale. It fits a c4 and it come out of a buddys car that stalled 3800 on the foot brake on a high 12 low 13 sec car but will stall different depending on combo and hp. It has about 10 passes and 100 street miles on it. Asking 500 OBO for questions or if you want pics by text my # is 606-424-4443.