Hyundai Verna 1.5 CRDi - 2005. Hyundai i30 CRDi VGT MK 1.6L - 2007-2011. Hyundai i30 CW CRDi VGT MK I 1.6L - 2008-2012. Turbo Pros High Tensile Stud And Nut Kit Is Manufactured From High Tensile Steel, These Studs Have A Higher Yield Strength And Tensile Strength Than Regular Mild Steel Grade.