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Want to clean a 4 stroke fuel system without dismantling it? The Liqui-Moly 4T Fuel System Cleaner is ideal for high performance 4 stroke engines as fuel flow and atomisation is critical. This concentrated cleaning formula is more effective than most fuel injection cleaners. It fully restores horsepower potential and efficiency through its deep cleaning action that removes stubborn build-ups of carbon & deposits. The special conditioners protect the entire system from fuel tank to combustion chamber, allowing optimum fuel flow. Suitable for engines that are carburettor, fuel injected or direct injected. It's a great way to cleanse a fuel system that has starting or hesitation problems, rough idling, poor acceleration or above normal exhaust emissions.