Ali Arc's feature product is the Kenworth T-660 Evolution style bumper with the 4" tube infront of the grill.  The 4" tube infront of the grill gives you the full protection you have come to expect from Ali Arc with the benifits of Aerodynamics and sleekness of a contoured tube.  To order yours, simply contact your closest Kenworth or Peterbilt dealer and give them part number KW077E. "You will be glad you did".