T3/T4 turbos turbos use the standard gasket Precision Street/Race turbos and entry level turbos use the standard gasket (4831, 5431, 5558, 5858, 6262, 6266, 6766, etc.) GT and GTX Series Garrett use the compact gasket (GT/GTX 28, 30, 35, etc.) Precision 30/35 turbos use the compact gasket (5130, 5530, 6235, etc.).
