This is a replacement for the standard as well as the -8 style racer safety that are in many current nitrous bottles. After adding the Qwik Trik Racer Safety you also be able to use our coupler (P# 19896). The Qwik Trik Racer Safety also includes a new pressure relief disc and needs to be installed and TORQUED to 15-17 lbs/ft. These adapters also feature a built in four way diffuser. The pictured Q-T Racer Safety in picture is already installed in this valve for illustration purpose only. These can also be ordered in new I-S 10# and 15# bottles at NO additional cost if ordered at time of purchase.