i have a used pro circuit T4 slip on for a honda trx 450r. it came off my 05 but i am sure it will fit the other year model's. i paid well over $300.00 for this new and the cheap painted decal thing came off the first time i washed it. it sounds really good and when i put my factory back on, i noticed a good bit of power difference between the two. the guy that bought my four wheeler wanted the oem pipe back on . but here's the pictures and the price will be $100.00. new price