Rennline s new tow hook receivers replace the factory bumper shocks with a crush style tube that the rennline s 2 inch screw in style tow hooks thread into, allowing a completely stock appearance on the street and enhanced functionality on the track. Powder-coated steel construction with stainless steel hardware, comes with black rubber bumper plug for stock appearance when hook is removed. Note: tow hooks sold separately- use part number re1309.