i have a complete holz coil over rear skid for all firecats that is 151 long its based off 153 rails and then made the rest of the skid to fit under the skiney frame this rear skid was made for z-broz racing and they never used it so i bought it from them holz has only made 2 of these skids and man do they work looking for offer and parts trade on a stock skid posbly with a 151 set up