People ask us constantly what wheel studs we prefer on track so we decided to start to offer them. These are the Motorsport Hardware race studs. These are by far the best race studs in the business. ISO certified by TUV with 10.9 grade Hardness, these studs will take the beating on track. Don't mess around with any other lower quality stud and buy the best here. Track/Race Applications ISO/TS 16949 & ISO 9001 Certified by TUV Choose 12x1.5 Thread Pitch Made in Europe Black Zinch Finish Bullet Nose with Allen Key Insert For Easy Install 10.9 Grade Hardness Includes Studs for All 4 Wheels. Direct Ship Fitment: 1 series (08-on), 3 series (79-2013), 5 series (75-2010), 6 series (75-2010), 7 series (75-87), 8 series, M3 (88-2013), M5 (85-2010), M6 (83-2010), Z3/4 (96-on) Fitment with Spacers: 44mm - No spacer 68mm - Up to 5mm spacer 75mm - Up to 15mm spacer 78mm - Up to 20mm spacer 82mm - Up to 20mm spacer 90mm - Up to 25mm spacer