Weistec has teamed up with ARP, the leading name in performance engine hardware, to bring you an exceptional product that truly makes a difference in your engine's reliability. If you’re looking to replace your factory head bolts, these head studs are the perfect solution. They securely fasten the heads to the block, ensuring a robust connection that’s vital for your engine's performance.
The connection between the cylinder heads and the block is intricate, with coolant and oil constantly flowing back and forth. A solid head gasket is essential for keeping these elements separate, relying on the pressure generated by the head bolts. The factory head bolts are "torque to yield," which means they stretch permanently when installed. Unfortunately, this can lead to issues, such as the stock M156 oil leaks that many have experienced, often stemming from an inadequate connection.
With a remarkable tensile strength of over 260,000 PSI, Weistec ARP 625+ head studs provide a level of pressure that far surpasses what factory bolts can handle, without the risk of permanent stretching. This means you can count on your engine to perform reliably without the worry of leaks between the heads and block. Quality head studs are essential for any engine aiming to achieve high power levels consistently.
Upgrade your engine with confidence and enjoy the peace of mind that comes with reliable performance. The Weistec ARP 625+ head studs are a fantastic investment for any serious automotive enthusiast!
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2007 Mercedes-Benz R63 AMG |
R63 AMG | 2007 |
|
2007-2010 Mercedes-Benz S63 AMG |
S63 AMG | 2007-2010 |

Based out of Orange County, California, Weistec Engineering is an industry leader in research, development, and design. While the company was only established in late 2010, founder Michael Weiss and his partner Steve Atneyel both have an impressive track record of working with some of the fastest and most powerful vehicles in the world. The duo were both engineers for major American OEM and aftermarket performance companies; Michael was involved with advanced engineering, while Steve specialized in computer calibration.
Michael Weiss and Steve Atneyel decided to branch out on their own and combine their expertise and experience. The pair were, and still remain, avid Mercedes enthusiast and realized that there was a huge gap in the market for a company dedicated to engineering state-of-the-art performance systems for cars powered by motors like the M156 and M159 AMG. Since its inception over a decade ago, Weistec has grown to provide customers with the highest level of satisfaction and value through unyielding tests and continuous improvements in Mercedes products and performance.
What Does Weistec Offer?Engineering and design are the two core services of Weistec Engineering. The Weistec team offers an array of services and capabilities thanks to the team’s combined experience from multiple fields. Whether you have a new idea or are looking to improve an existing design, Weistec can bring your concept to reality while protecting your vehicle’s design form and engineering function. Services include CAD, CAM, rapid prototyping, CNC machining, laser cutting and etching, casting, plastic injection molding, 3D laser scanning, and much more.
Weistec Engineering also offers a comprehensive line of products to the import and exotic market, covering vehicles such as Mercedes-Benz, Audi, Pagani, Alfa Romeo, BMW, McLaren, Ford, Aston Martin, and Maserati. No matter what type of upgrade you are looking for, Weistec has something for everyone when it comes to performance products, suspension parts, electrical components, interior/exterior accessories, and wheels/tires.
Weistec Engineering keeps nearly every aspect of its production process in house to guarantee only the highest quality. From conceptual 3D designs to in-house manufacturing and, ultimately, road and track testing, Weistec boasts relentless attention to detail on everything it offers. Specializing in computer-aided design and vehicle calibration, Weistec has the ability to manufacture quality products that are capable of withstanding even the most rigorous testing conditions. From OEM vehicle manufacturers to the aftermarket performance enthusiast, Weistec aims to deliver innovative solutions that address a wide range of client needs and desires.
Find Weistec Parts at Vivid RacingVivid Racing carries an extensive lineup of Weistec products to suit all your needs and preferences. Our inventory is virtually endless with everything you could possibly need to upgrade your vehicle in terms of performance, power, handling, suspension, aesthetics, and accessories. If you cannot find what you are looking for above or need help choosing a product for your needs, please give us a call at (480) 966-3040. We will advise you on the possible options and walk you through the entire purchase process to ensure a hassle-free experience.