Magnus ARP2000 Head Studs for McLaren M838T/M840T

Magnus Motorsports ARP2000 head studs for McLaren M838T and M840T engines. Full set is a direct OEM replacement to factory spec with no block adjustments necessary to handle high horsepower over stock for street and track builds.

Vehicle Fitment:
• McLaren M838T and M840T engines

Purchase Includes:
(20) ARP2000 M12 Studs
(20) Washers
(20) Nuts

Why choose ARP2000 over L19 head studs? 
ARP2000 are most commonly used when upgrading/replacing over stock head studs due to their low cost compared to any of the tool steel fasteners and higher clamping force over stock head studs. Compared to L19 they are less susceptible to hydrogen embrittlement and stress corrosion making it easier to handle. For cars making less then 1300HP where clamp load isn’t as critical and seeing extreme amounts of cylinder pressure this is the best cost effective option.

ARP2000:
• Modified 8740 alloy with enhanced alloying/heat treat.
• Typical tensile strength ~220,000–230,000 psi.
• Best for High-performance street and track; moderate-to-high boost.
ARP2000 delivers higher strength and fatigue resistance versus 8740, maintaining clamp load under elevated cylinder pressures. It’s an ideal all-rounder for boosted builds.

ARP L19:
• Enhanced alloy/tool-steel family.
• Typical tensile strength ~260,000 psi.
• Best for Extreme boost/nitrous; drag and endurance where clamp load is critical.
L19 significantly improves ultimate strength and stretch resistance for severe duty. Handle and store carefully: L19 is moisture sensitive and should be kept clean and lightly oiled.