DIRECT FIT REPLACEMENT - Fits all Subaru Impreza WRX & STI TURBO EJ20 2.0L and EJ25 2.5L DOHC Turbo Engines. Engineered to unleash more performance out of your vehicle. Centerless ground to assure perfect concentricity.
ULTRA STRENGTH - XOTIC 7200 material properties allow for far greater tensile strength compared to 8740 chromoly steel head studs. Rated at 220,000 psi tensile strength. Threads rolled after heat treatment for optimum fatigue strength. Ample clamping strength prevents cylinder heads from lifting.
EASY INSTALLATION - Broached stud ends install & make cylinder head removal easier. Installation manual is included with drawn diagrams to ease the installation process. Head studs are designed to retain cylinder seal even with today's extreme high pressure turbo systems. These studs far exceed clamping forces provided by standard head bolts.
KIT INCLUDES - 12x Heads Studs, 12x Nuts, 12x Hardened Parallel Washer, 1x 9/16 12pt Socket, 1x 4mm Allen Wrench, 1x Fastener Assembly Lubricant & Instruction Manual. Black oxide finish protects from wear and tear. Hardened parallel washers allow for uniform load distribution and accurate torque readings.
WORRY-FREE PURCHASE - Xotic Performance is dedicated to offering LIFETIME WARRANTY and full money back guarantee if you aren’t satisfied. Rigorous quality inspections are undertaken to ensure premium product standards.
Do you have any certificate/tensile strength exam that can attest to the tensile strength you advertise?
Yes, please click on the following link for a tensile strength report by Atrona Labs. We test our head studs extensively to ensure premium quality standards. The video demonstrated in this short preview highlights the one of many spot inspections performed for our head studs.
Do these head studs come with paperwork?
Detailed instructions are included as part of the kit.
Does the kit include an assembly lube?
Yes. Assembly lubricant is included as part of the kit.
What is the tensile strength?
What material are they made of?
XOTIC 7200 head studs are made from premium steel alloys that allow for far greater tensile strength compared to 8740 chromoly steel head studs.
Do these come with instructions/torque sequence for replacing 1 at a time with the heads on?
This kit includes instructions with torque spec and sequence.
Fits all Subaru Impreza WRX & STI TURBO EJ20 2.0L and EJ25 2.5L DOHC Turbo Engines.
12x Heads Studs
12x Hardened Parallel Washers
1x 9/16 12pt Socket
1x 4mm Allen Wrench
1x Fastener Assembly Lubricant