I recently purchased the Ulter Centre Exhaust along with a diffuser, and I’m really pleased with the result. The exhaust and diffuser arrived on different days, but both were well-packaged. The exhaust looks great and has a nice tone noticeable without being too loud or intrusive. The diffuser was a good fit, contrary to some reviews I had seen. Instead of using the small self-tappers supplied, I opted for small stainless nuts and bolts with stainless penny washers for a more secure fit. The exhaust and diffuser was a little expensive, but well worth it in my opinion. Overall, a high-quality upgrade that I’d definitely recommend!