Evo 123 - ARP - 4G63T Head Stud Kit

ARP Head Stud Kit for the 4G63T (7-Bolt)

ARP head studs replace the factory torque-to-yield head bolts with a stronger, reusable fastener that delivers higher and more even clamping load across the cylinder head. On a boosted 4G63 this is one of the first hardware upgrades for any built motor: it keeps the head sealed to the block under high cylinder pressure and prevents head lift and head-gasket failure when you raise boost or compression.

Specifications

• Material: ARP2000 alloy, approx. 220,000 psi nominal tensile strength
• Type: Full thread stud kit, hardened parallel-ground washers and 12-point nuts
• Reusable, unlike the single-use OEM stretch bolts
• Includes ARP Ultra-Torque assembly lubricant for accurate, repeatable clamp load

Why it matters on your Evo 1-3

The 4G63T makes serious power on boost, and stock head bolts can let the head lift once you push past factory output. This stud kit is the foundation of a reliable high-output 4G63 build.

Fitment

Mitsubishi Lancer Evolution I, II and III (CD9A / CE9A), 1992 to 1995. 7-bolt 4G63T 2.0L turbo.