ARP Reinforced Con Rod Bolts for PSA XU9 XU10

This reinforced con rod bolt kit for XU engines consists of 8 ARP bolts.

You will find the fitting instructions in the "Download" tab above.

Below (click on the image) you will find the tri-metal big end bearings for PSA XU engines:

Coming from the aerospace industry, Gary Holzapfel founded the ARP (Automotive Racing Products) brand in the early 1970s to address a major motorsport problem: engine failures caused by bolts and studs that were not strong enough. At the time, no manufacturer was able to meet this need. Today, ARP offers thousands of part numbers across different ranges and product types, such as head bolts, main bearing bolts, con rod bolts... Depending on the application, ARP offers different ranges (materials) of fasteners:

• 8740: a chrome-molybdenum steel with standard strength properties, well suited to tuned engines. This steel offers a tensile strength of between 1240 and 1447 N/mm².
• ARP2000: stronger than 8740, the ARP2000 alloy can withstand clamp/tensile loads of up to 1516 N/mm². This range of bolts is frequently used on track and drag cars and is suitable for use with hydrogen.
• L19: a higher-grade treated steel offering tensile and fatigue strength properties clearly superior to the 8740 and ARP2000 ranges. Its tensile strength can reach up to 1792 N/mm². This material is more sensitive to corrosion and must therefore be kept oiled and not exposed to moisture. Using hydrogen with this range is not recommended.
• CA625+ (Custom Age 625 Plus): this "super-alloy" has markedly superior technical properties while remaining resistant to corrosion and oxidation. Its tensile strength can reach up to 1930 N/mm².

All ARP fasteners are designed and manufactured in the USA. Manufacturing starts with cold or hot forging, followed by heat treatment (which varies by range) and shot peening to remove irregularities. Precision grinding then follows to achieve perfect concentricity, before the thread is cut. Finally comes the finishing stage, during which a coating is applied, such as black chrome-molybdenum oxide or stainless steel polishing, depending on the product range.

Each kit is supplied with assembly grease and instructions stating:

• the installation steps
• the tightening torque
• the tightening procedure