Product Description
Designed around factory valvetrain and piston clearance limitations. Increase in mid and upper RPM power. TECH TIP: Can be used with factory valve springs and retainers to 8K rev limit, but FP beehive spring kit recommended. Can be used with factory pistons. Somewhat lumpy idle. Recommend increasing idle RPM to ~1000RPM. Fits: Mitsubishi Lancer Evolution VIII 2003-2005
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