Hi there, new to the post so I thought I'd ask a question. I am looking for some more power out of my 450. I plan on 27"itp 589 with type 5 rims. In the near future. I have a 4 year warranty so I don't want to get into porting or internal engine work. I am looking into exhaust, filter and jet kit. So if I have warranty work I could pull them off so they don't try to give me the run around. So for the question. What do you have for exhaust or what do you recommend??? I use my foreman for trail riding along with hunting so I don't want it really loud. Thanks in advance for your advice.