2JZ 2JZ-GE 2JZ-GTE ARP L-19 1/2" Head Stud Kit
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ARP L-19 1/2" Head Stud Kit for Toyota 2JZ engines.
Planning on cranking 45psi and above??? Then you will need L-19 1/2" studs baby!!!
These are the ultimate in head torque and are custom made for Paradise Racing!!!
L19 differs from ARP2000 in that it is a vacuum melted alloyed steel with sufficient chromium and carbon to achieve high hardness (but below the level of a stainless steel). L19 is air-cooled from the hardening temperature in a way that does not require an oil quench to achieve full hardness and is tempered to assure full conversion to martensite between 1025°F and 1075˚F. L19 is a proprietary material capable of achieving strengths of 220,000/230,000 or 260,000/270,000 psi as may be required. Both L19 and ARP2000 steels are modified bcc (martensite) at room temperature. L19 has the same advantage as ARP2000 in that a high strength is obtained at a high tempering temperature. This alloy is easily contaminated and requires special handling.
These are 1/2″ size and require modifications to your head & block!!!
Your head will have to be drilled and your block will have to be drill and tapped for 1/2″ threads.
We have used these head studs to support 60psi!!!