These Pro series studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 190,00 psi.
The pro series kits are also available with 12-point nut, and all kits come complete with hardened parallel washers for an even load distribution and accurate torque readings.
More Information
Product Name
ARP 4AGE 16V Head Studs (203-4203)
Brands
ARP
Engine
4AGE
Make
Toyota
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
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Disclaimer:
Product images are for description purposes only. Actual product may vary.
What is the difference between ARP2000, L19 and CA625+?
ARP2000 suits most high-performance builds. L19 offers higher strength but is sensitive to handling and corrosion. CA625+ is used for extreme cylinder pressure or rpm.
Why is ARP lubricant important?
ARP torque values assume Ultra-Torque lubricant on threads and under the head. Without it, clamp load becomes unpredictable.
What is the recommended torque specification for the ARP 4AGE 16V Head Studs?
For the ARP 4AGE 16V Head Studs, follow ARP's latest torque specifications. Typically, you should torque the studs to around 75 ft-lb using ARP Ultra-Torque lubricant. Always ensure to follow the manufacturer's instructions for accurate torque settings.
Do I need to machine the cylinder head or block when installing these head studs?
While the ARP 4AGE 16V Head Studs are designed to fit OEM specifications, it's advisable to check the surface finish of the cylinder head and block. Ensure they are flat and within the required RA surface finish for optimal sealing and performance. Machining may be necessary if there are any imperfections.
Can I reuse the ARP 4AGE 16V Head Studs after removing them?
ARP recommends against reusing head studs after they have been torqued. The material may have undergone stress and could lose its integrity. For best performance and reliability, it’s advisable to use new studs for each installation.
What additional components should I consider when installing the ARP 4AGE 16V Head Studs?
When installing the ARP 4AGE 16V Head Studs, consider using a quality head gasket suitable for your application. Also, ensure that you have the correct washers and nuts included in the kit for even load distribution. It's important to check the condition of the cylinder head and block as well.
