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Mitsubishi Evo X (CZ4A) Engine Components FAQ's

Please read our FAQs page to find out more.

What internal upgrades are common for higher-boost Evo X builds?

Forged pistons and rods, performance bearings, and ARP head studs are typical past basic bolt-ons. Pair with cams and valve springs for sustained high RPM.

Does the 4B11T benefit from a head gasket upgrade on the Evo X?

For elevated boost or frequent track use, an MLS gasket with proper surface prep and torque helps maintain sealing and reliability.

Are aftermarket camshafts worthwhile on the Evo X?

Stage 1–2 cams improve top-end flow and powerband width. Degree the cams and retune for MIVEC targets and idle quality.