This section doesn’t currently include any content. Add content to this section using the sidebar.

Image caption appears here

Add your deal, information or promotional text


ARP Head Stud Kit Focus RS Mk2

 This custom-made ARP Head Stud Kits suiting the 5-cylinder engines are simply the best stud setup available in the market today. They are manufactured using premium quality heat-treated 8740 chrome moly steel. This ARP Head Stud Kit is meant to replace the original Ford head bolt 

ARP uses a premium quality (SDF and CHQ grade) 8740 chrome moly steel alloy that is rated superior to aircraft quality. Each stud is placed vertically in special racks and heat-treated to ensure 360° penetration. This procedure is far superior to other methods of dumping items in a large bin and batch treating.

Following heat-treatment, each stud is shot-peened to remove surface irregularities, and then undergoes a centreless grinding process to ensure they are perfectly concentric. This procedure involves about ten machining steps for an exceptionally straight part.

The studs are then thread rolled after heat-treatment, which gives them about 1000% (10 times) more fatigue strength than those studs that are threaded prior to heat-treatment.

ARP Nuts are manufactured in a multi-step process that "blanks” the hex and 12-point nuts and is followed by a CNC-threading process which taps each nut with an accuracy of .001K (5 times higher than the aerospace standard). This ensures an exceptionally close-tolerance fit between the bolt/stud and nut.

Kit Contents


  • QT 12 Head Studs
  • QT 12 M12 Nuts
  • QT 12 M12 Washers