Using BORLA Stainless Steel Polish p# 21461 is NOT recommended with these black chrome tips.
4L engine models;All cab and bed configurations;Pipe diameter 3.And as you would expect it is covered by the Borla Million Mile Warranty.5;Black tip included;Tip size 5;Truck side behind rear wheel exit style;California Residents: WARNING It utilizes high quality T-304 stainless steel, superior to T-409, for durability, mandrel bent pipes for high flow and a uniquely designed muffler to give you the best sound without drone.