Choice for Mitsubishi and Haval models — Denso K20PR-U11 3121 Nickel Alloy Spark Plug High Cost Performance

DENSO K20PR-U11 3121 nickel alloy spark plug as OEM standard replacement; though without a direct OEM number it has broad compatibility, perfect substitute for Mitsubishi, Haima and other post-2000 models’ original plugs. Core function is to ignite the mixture to ensure normal engine operation; after installation, cold-start hesitation and acceleration jerk noticeably improve, delivering smoother power. If rough idle, higher fuel consumption, or sudden acceleration ping/knock occur, indicates aging plug or large electrode gap; replace to restore performance.