Moroso 94051 Moroso spiral flow racing muffler with 3 inch inlet and outlet. Using advanced gas dynamics and sophisticated noise cancellation acoustics, Moroso engineers have developed the spiral flow racing muffler. Specially engineered spiral baffles divide the exhaust flow into two seperate paths, significantly reducing noise levels with minimal backpressure. These mufflers ofer a 5-7 db drop over open collectors. The all steel construction makes them durable. Sold as one Moroso spiral flow muffler. Moroso 94051 Moroso spiral flow racing muffler 3" 94051 We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.