DIRECT FIT REPLACEMENT - Fits 6.6L L5P Chevrolet GMC Duramax 2017-2020 Models. 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 - 36x Heads Studs, 36x Nuts, 36x Hardened Parallel Washer, 12x Rocker Arm Bolts, 1x 10mm Socket, 1x 16mm Socket, 1x 5mm Allen Wrench, 1x Fastener Assembly Lubricant & Instructions 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.
2020 Chevrolet / GMC 6.6 Duramax
2019 Chevrolet / GMC 6.6 Duramax
2018 Chevrolet / GMC 6.6 Duramax
2017 Chevrolet / GMC 6.6 Duramax
- 36x Heads Studs (M12 x 157mm)
- 36x Nuts (M12)
- 36x Hardened Parallel Washers
- 12x Rocker Arm Bolts (M8 x 122.5mm)
- 1x 10mm Socket
- 1x 16mm Socket
- 1x 5mm Allen Wrench
- 1x Fastener Assembly Lubricant
- 1x Instruction Manual
In every diesel car, there are high cylinder pressures that can damage head gaskets. Factory OEM head bolts are torque to yield, meaning you torque the bolt to a specific torque with a final 90 degree rotation that will place the bolt at its’ maximum stretch point.
Our observation through years of dealing with trucks is that when you add parts that increase horsepower (turbocharger, injectors, chips etc.), you risk creating higher cylinder pressures lower than your RPM range, consequently leading to a blown head gasket.
In contrast to head bolts, head studs are engineered to not stretch. Xotic Performance head studs are created using premium steel alloys (XOTIC 7200) that are far superior in tensile strength to a bolt. Our head studs are threaded on top to allow for nut placement which will result in a more accurate torque of the head.
Rather than blowing your head gasket again, we highly recommend replacing your head gaskets with fasteners that have a proven track record of not stretching - so that you never have to deal with the exhaustive procedure of replacing another failed head gasket.
they seem as good as the competition , time will tell .