These studs are just Zippy! They arrived in good condition and in a timely manner. The machining and finish are up to par, so these studs look like they will work just swell. Unless I update his review with a sad story about blown head gaskets, I would recommend these and would purchase them again. You save a few $$ over the famous brand, but I believe that the motor is not worried about a brand name, as long as it gets a sexy set of Studs screwed into it.
I have not installed these yet, however I just finished 2 of the work trucks so will be starting my build soon, they came well packaged and so far have met all my standards. Will be installing soon and will update again once I have used them
26x Heads Studs (14x M12 x 146mm, 6x M12 x 199.7mm, 6x M12 x 96.5mm)
26x Nuts (M12)
26x Hardened Parallel Washers
6x Rocker Bolts (M8 x 75mm)
1x Allen Wrench (5mm)
2x Sockets (10mm and 14mm)
1x Fastener Assembly Lubricant
1x Instruction Manual
Head Studs Vs. Head Bolts
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.
INDESTRUCTIBLE TENSILE STRENGTH
XOTIC 7200 material properties allow for far greater tensile strength compared to 8740 Chromoly steel head studs. Threads are rolled after heat treatment for optimum fatigue strength. Premium quality inspection standards ensure you'll never get a blow head gasket again. Save time and hassle by purchasing our ready machine milled rocker arm pedestals (Search Part # CP200 in our catalogue).
Broached stud ends install & make cylinder head removal easier. Engineered to unleash more performance out of your vehicle. Ample clamping strength prevents cylinder heads from lifting.
ULTRA CLAMPING FORCE
Head studs are designed to retain cylinder seal even with today's extremely high-pressure turbo systems. These studs far exceed clamping forces provided by standard Ford head bolts.
NUTS & WASHERS INCLUDED
26x Heads Studs, 26x Nuts, 26x Hardened Parallel Washer, 6x Rocker Bolts, & 1x Fastener Assembly Lubricant. Black oxide finish protects from wear and tear. Hardened parallel washers allow for uniform load distribution and accurate torque readings.
INSTRUCTIONS INCLUDED WITH DRAWN DIAGRAMS
All details including torque recommendations are included in the manual for your reference.
Frequently Asked Questions
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 one of many spot inspections performed for our head studs.
Why choose Xotic Performance head studs over other head studs?
The answer is simple - our long-term vision is to provide premium performance products at an affordable price any car enthusiast can afford. We understand we're a relatively new company, but that doesn't change the quality of products you receive. Our head studs have been put to the test by the thousands, and we can assure you you're getting quality for an affordable price.
I liked that they came with the sockets and Allen wrench to install
Don Liggett (Allerton, US)
Thought I would try them as a cheaper alternative.
Everything was there as promised. Torqued them down more than recommended they held up good. Now I’ll see how they hold up to lots of boost. Lol
Jason Blanchard (Toronto, CA)
Very happy with this kit.
I’ve used ARP in the past but thought I’d try these instead. Fast shipping good instructions and assemble lube included . I purchased on a suggestion from a friend who has used these in a 1000 hp pull truck with no problems. I think I’ll be just fine with my 600 hp compound setup.