21mm 3/4"Dr 6 Point Standard Impact Socket Flat Wshr 3/8 ZP and it's a great option

and it's a great option for your street car

HEADER GASKETS - HI-TEMPERATURE - 302C

The box ends also feature Z-Drive design that contacts the flat walls of fasteners for better grip and less chance of rounding (up to 32mm)

Minimal Quantity Lubrication (MQL) applications

21mm 3/4"Dr 6 Point Standard Impact Socket Flat Wshr 3/8 ZP and it's a great optionThough impact sockets look similar to normal sockets and are physically interchangeable, impact sockets are made to withstand higher levels of force. Using a normal socket in an impact wrench can damage the socket and may result in injury Chrome Molybdenum, drop forged, six point impact sockets. Hardened and tempered for strength and with Phosphate finish for greater corrosion resistance. Ideal for use with air impact wrenches. Outside diameter 35mm