Reinforced ARP head studs kit Suzuki 1.6 125hp M16A

This kit of reinforced cylinder head studs for the SUZUKI 1.6 125hp M16A is made up of 10 ARP studs, 10 ARP washers and 10 ARP nuts.

The fitting instructions are available in the "Download" tab above.

Coming from the aerospace industry, Gary Holzapfel founded ARP (Automotive Racing Products) in the early 1970s to solve 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 that need. Today ARP offers thousands of part numbers across several ranges and product types, including head bolts, main bearing bolts and connecting rod bolts. Depending on the application, ARP offers several fastener materials:

• 8740: a chrome-molybdenum steel with standard strength properties, entirely suitable for built engines. Tensile strength between 1240 and 1447 N/mm2.
• ARP2000: stronger than 8740, this alloy withstands clamping and tensile loads up to 1516 N/mm2. Widely used on track and drag cars, and compatible with hydrogen.
• L19: a premium treated steel offering far higher tensile and fatigue strength than 8740 and ARP2000, up to 1792 N/mm2. More sensitive to corrosion, it must stay oiled and away from moisture. Not recommended with hydrogen.
• CA625+ (Custom Age 625 Plus): this super-alloy combines much higher technical properties with resistance to corrosion and oxidation. Tensile strength up to 1930 N/mm2.

All ARP hardware is designed and manufactured in the United States. Production starts with cold or hot forging, followed by a heat treatment that varies with the range and by shot peening to remove irregularities. Precision grinding then delivers perfect concentricity before the thread is made. Finishing comes last, with a coating such as black chrome-molybdenum oxide or stainless steel polishing depending on the product range.

Every kit is supplied with assembly lubricant and an instruction sheet stating:

• The installation steps
• The thread of the bolts, studs and nuts
• The tightening torque
• The tightening procedure