Grand Rock - Mack Truck Type 1 Muffler - 4" Inlet & 4" Outlet page64_23 OD-OD (straight on both ends)

OD-OD (straight on both ends) or OD-ID (straight on one end and expanded on the other end

use our Savage APC (All-Purpose Cleaner) to prepare the surface

Fits All 1996 & Newer Freightliner Columbia

Colored Rubber Inserts

Astatic gives you the dynamic quality communications you deserve

Grand Rock - Mack Truck Type 1 Muffler - 4" Inlet & 4" Outlet page64_23 OD-OD (straight on both ends)Grand Rock Mack Truck Type 1 Muffler 4" Inlet & 4" Outlet Grand Rock Mack Truck Type 1 Muffler 4" Inlet & 4" Outlet Fits Most MACK Truck Makes and Models 4 Inch Inlet ID (inner dimension) 4 Inch Outlet OD (outer dimension) 8. 4 inch round diameter 41 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