ARP Head Stud Kit Subaru Impreza WRX STI 2.0L 2.5L EJ20 EJ25 DOHC Turbo 260-4701

ARP SUBARU IMPREZA EJ 2.0L 2.5L Head Stud Kit 260-4701. SEALED brand NEW ARP Head Stud Kit. Kit comes with (12) Head studs , (12) washers, (12) nuts needed for a direct bolt on, the ARP moly-lube and instruction sheet.

ARP SUBARU IMPREZA EJ 2.0L 2.5L Head Stud Kit 260-4701. Complete with Studs, Washers, and Nuts ARP Head Stud Specs made out of premium 8740 alloy rated far superior to aircraft quality Heat treated to 200,000 psi Thread Rolled after heat treat (1000% better than studs that are thread rolled prior to heat treat Some Technical info on Studs Using studs will make it much easier to assemble an engine( especially a racing powerplant which must be serviced frequently and quickly!) with the cylinder head and gasket assured of proper alignment. Studs Provide more accurate and consistent torque loading ( When you use bolts to secure the head, the fastener is actually being twisted while it's being torqued to the proper reading. acordingly, the bolt is reacting to two different forces simultaneously. A stud should be installed in a relaxed mode - never crank it in tightly using a jammed nut. If everything is right, the studs should be installed finger thight. Then, when applying torque to the nut, the stud will stretch only on the vertical axis. Tech Tips: Main Stud Installation Clean and chase appropiate threads in block to ensure proper thread engagment and accurate torque readings All hardware (and caps) should be cleaned and inspected prior to installation, looking for any shipping damage or defects Screw studs into block, finger thights ONLY. For permanent installation, apply loc-tite sparingly to threads. Be sure and install the caps promptly before the cement sets to prevent misalignment of studs in block. Install main caps, checking for binding and misalignment. lubricate threads, nuts and washers with oil or arp moly assembly lubricant before installation. Note that torque specs will vary by lubricant. moly lube is more consistent. Have block align honed. Usins the instructions provided with the studs, tighten the nuts to proper torque values three times. NOTE: if using Loc-tite proper preload must be achieved prior to it setting up.