This is an upgraded rebuild kit for Evo 1 - 3 and Evo X, 16g, 18g, 20g, turbo rebuild kit. This kit also works with Blouch, FP, MAP, Tomica Racing turbochargers and more! This rebuild kit is for standard rotation TDO5 TDO6 turbochargers with a superback style compressor wheel (most common). This is the highest quality rebuild kit on the market, we have several people pushing 34 PSI with this rebuild kit on a daily basis. NOTE: For the OEM turbo you often have to cut the bearing housing above the thrust bearing area to allow for the larger thrust spacer (18mm vs 14mm). This kit is not for Evo 4-9, the thrust bearings are directional, see our other listing!