3″ X 3″ Straight Crossmember Aluminum Over 58″ Any Crossmember Over 58″ Long. SKU: 1184 Category: Crossmembers Related products 3″ X 3″ Straight Crossmember Aluminum Under 58″ Call For Price Part #:4223 Any Crossmember Under 58" Long. 6 1/2″ Aluminum I Beam Call For Price Part #:217 Sold By The Foot. 5 1/2″ Aluminum I Beam Call For Price Part #:216 Sold By The Foot. Aluminum Straight Crossbar Extended Step Call For Price Part #:3608 Extends Past The Frame For Extra Fender Support. One Front And One Rear Of The Fender. Up To 105" Long.