WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.KEEP IT TOGETHER
Meet your ultimate defense against head lift. iE HoldStrong Head Studs are engineered and manufactured for structural integrity to go toe-to-toe with the demands of high-output engines. They’re made to keep your engine together and sealed tight using a rolled-thread process, chromium-based H11 tool steel and aircraft grade J-threads for maximum strength.
LEADING FEATURES
- Turn it up -Engineered to meet the demands of high-power engines
- 211 ksi yield strength -Market leading 33.54% stronger than stock
- Ultimate strength -Chromium-based H11 tool steel alloy
- Aerospace-style J threads -Minimizes stress points
- Rolled threads in pure oil solution -High strength and precision
CHROMIUM H11 TOOL-STEEL
It’s not rocket science, but it’s close. Our chromium-based H11 tool steel alloy is known for its use in aerospace industry applications like helicopter blades and landing gear. H11 is widely used for its crack-resistant properties to prevent thermal fatigue or thermal shock. This alloy’s low-carbon content gives it strength with minimal distortion when tooling. If it’s good enough to land a plane, it’s the right choice for your high-performance engine.
PREMIUM ROLLED THREADS
iE head studs are manufactured using a rolled method in a pure oil solution. The alloy material is shaped rather than removed (cut) which creates a compressive force that strengthens the thread and eliminates imperfections that could cause stress cracks. Rolled threads are built for strength and extreme fatigue resistance.
iE J-THREAD
The sharp edges and corners of standard cut thread can cause stress points that lead to bolt failure. To prevent this, iE head studs have been engineered with J-threads. This higher quality thread profile has a curved minor-diameter structure to reduce stress points and prevent breakage from vibration. J-threads also provide a more accurate sizing for an exact dimensional fit.
INSTALLATION
Follow the below steps to ensure proper installation of your iE HoldStrong head studs.
- Fully clean head stud hardware and threads in the engine block. Inspect closely for any signs of thread damage, obvious defects, or shipping damage.
- Thread the studs into the block hand tight only.
- Carefully install the cylinder head using the head studs as a guide, avoiding any misalignment or binding.
- Apply a quality engine assembly lubricant to the stud threads, washers, and nuts.
- Install the washers and nuts onto each stud hand tight only.
- Following the Audi factory torque sequence (see image below), tighten the nuts in three equal steps to 80 ft-lbs.
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