Specifications include, but are not limited to: 10 ¾” steel rails, steel cross members, 306-342 in 3/8” rail thickness 10.75 x 3.5 x 0.375 RBM = 1,960,000. 4 piece nylon insert frame fasteners. Class 10.9 bolts. 3 piece C-channel cross member with cast gussets. Chassis hose and wiring bundles conveniently routed through gussets. Full steel inner liner. FEPTO Provision 9 inch bumper extension. Includes 1350 series front drive PTO attachment provision, radiator with PTO, cut-out in grille, radiator protection sleeve, and bumper extension. Huck Bolt All Accessible Frame Components except EOF cross member. EOF square without cross member for use with body builder installed cross member. Omit rear mud flaps and hangers. Peterbilt Front Wheel Mud flaps with two (2) solid mount cable hooks.