Spoon Tail Silencer (N1) - Honda - Civic Type R FD2RSpecifications: Manufacturer: Spoon Reference Number: 18030 FD2 011 Type: Muffler Material: Stainless Steel The Spoon N1 back box was developed and used on Spoon's race vehicles and is the ideal back box for the street and circuit enthusiast. The N1 back box provides significantly improved exhaust flow and can be used with the stock b pipe as it uses stock style flanges. In addition, the N1 back box is one of the lightest available, weighing only 7.