ARP SR20 Head Stud Kit

Description

ARP SR20 Head Stud Kit

Automotive Racing Products (ARP) are the leading brand in fastener technology. All fasteners are made with the highest quality materials with quality assurance testing. We use one of the available ARP kits for every SR20 build we complete and they have delivered time and time again,

The ARP SR20 Head Stud Kit is available in three different materials including 8740 Chrome Moly, ARP2000 and CA625+. Each material varies in it’s tensile strength and your choice will come down to how much you need in your engine!

8740 Chrome Moly (180,000 – 210,000 PSI): Until the development of today’s modern alloys, chrome moly was popularly considered a high strength material. Now viewed as only moderate strength, 8740 chrome moly is seen as a good tough steel, with adequate fatigue properties for most racing applications, but only if the threads are rolled after heat-treatment, as is the standard ARP production practice. Typically, chrome moly is classified as a quench and temper steel, that can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi.

Note: The 8740 kit will be labelled as VW Golf and is done so purposefully! All good SR20 engine builders know and use this kit as they are the longer version of studs which correctly and properly bottom out in the SR20 engine.

ARP200 (220,000 PSI): ARP2000 is an alloy steel that can be safely heat treated to a higher level, producing a greater strength material than 8740. While 8740 and ARP2000 share similar characteristics – ARP2000 is capable of achieving a clamp load at 220,000 psi. ARP2000 is used widely in short track and drag racing as an up-grade from 8740 chrome moly in both steel and aluminum rods. Stress corrosion and hydrogen embrittlement are typically not a problem, providing care is taken during installation.

CA625+: This newly formulated super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness – with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Best of all it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength, super-alloy field. Typical tensile strength is 260,000-280,000 psi.

Note: The CA625+ kit is a special order with an approximate lead time of 2 – 5 days. This kit is a customized kit including a set of 10 head studs, 10 parallel ground washers, ten 8740  nuts and fastener assembly lubricant. This kit utilises all genuine ARP products featuring Dog Point bottoms. A Dog Point is a straight pointed section, reduced in diameter slightly below the root diameter of the thread. It usually extends in length about two-thirds the diameter of the thread. This aids component assembly, seats studs in the block, and preloads the fastener for accurate, repeatable torque sequencing. Generally recommended for over 1000HP applications.

Please enquire with us to order the CA625+ SR20DET Head Stud Kit.

ARP SR20 Head Stud Kit Suits: Nissan SR20DE and Nissan SR20DET engines

Want to talk to us?

At Street Race Solutions, we utilise ARP SR20 Head Stud Kits in all of our SR20 engine builds. If you have any question relating to ARP Fasteners or SR20 engine components, please call us on 07 4602 3858 or email us at info@srsparts.cmom.au