Hello. A friend of mine is getting a Pro Circuit T-4 exhaust for his 01 300ex. He is just getting the silencer not the head pipe. Will the silencer require jetting changes. What is the stock main jet for a 300ex? Also, does this silencer make a lot more power over stock or is there a better pipe that you would recommend? Thanks alot.

 

Yea re-jet it it will run it to the max, there is big power improvement when buying a t-4. I have a 400ex, but There shouldn't be much differnce between a 400 and a 300ex pipe. Lot more over stock. i recommend the pro circuit t-4