Until now, track enthusiasts who removed there bumper supports to reduce weight had no options for mounting tow hooks for track applications. Rennline 's new tow hook receivers replace the factory bumper shocks with a bolt on mount that rennline s screw in style tow hooks thread into, allowing a completely stock appearance on the street and enhanced functionality on the track. All rennline s tow hooks have a 2 opening, as required by most track sanctioning bodies. Powder-coated steel construction with stainless steel hardware, comes with black rubber bumper plug for stock appearance when hook is removed. Screw in hook (p/n re1309, re0509 or re0609) sold separately. Note: all front mounts utilize the factory tow hook hole location. All rear hooks require a hole added into the bumper cover. this is for the receiver only.