they replaced only one cam... In my opinion, using the type r cams with tsx head will make power. Neil made 234 whp with stock TSX block and type r head... but really a type r head is a rsx type s head with type r cams and springs... so.... since tsx head and rsx head are not that much different in flow numbers,,, you should be able to get good gains with the type r cams. I hope I will because I am using them on my motor... But because my tsx head was burned in a fire, I am using a type s head but I think the tsx head might even yield higher TQ numbers.Huggy Bear said:Didnt they determine that they lost mid range power with them, or lose power using the DC5R exhaust cam?