Grand Rock - Type 4, 11" x 36", 4" ID - 4" ID Exhaust Muffler Brand_Rockwood 25" size makes it ideal

25" size makes it ideal for tight spaces

The Right Weigh Load Scales

Hammer Lane's "Blue Kwopper" T-shirt

Horn lengths: 19

Grand Rock - Type 4, 11" x 36", 4" ID - 4" ID Exhaust Muffler Brand_Rockwood 25" size makes it idealGrand Rock Type 4, 11" x 36", 4" ID 4" ID Exhaust Muffler Grand Rock Type 4, 11" x 36", 4" ID 4" ID Exhaust Muffler 4 Inch Inlet ID (inner dimension) 4 Inch Outlet ID (inner dimension) 11 inch round diameter 36 inch length Sold Individually Made in the USA Grand Rock Company is a major manufacturer and warehouse of superior exhaust systems for the aftermarket. Since 1970 Grand Rock has had its sights set on providing the customer with only the best