i was skeptical before purchasing this muffler, but I was pleasantly surprised with the results. Automotive enthusiasts will appreciate the deep, low rumble that the muffler produces. As my tests showed there was a noticeable improvement in my car`s horsepower and fuel efficiency .The installation process was simple and straightforward. My only concern is that it may be a bit too loud for some drivers, but it's a trade-off for the improved performance. Overall, I highly recommend this muffler for anyone looking to enhance their car's sound and performance..