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Hi-Gear EZ Emissions Pass & Catalytic Converter Cleaner

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This product from Hi-Gear is designed to do exactly what it says on the can, which is tackle horsepower loss, improve efficiency, and reduce emissions of noxious gases. It cleans fuel systems injectors, combustion chambers, pistons, and valves. It also prevents vehicles from emitting that notorious rotten egg smell. 

This catalytic converter cleaner efficiently tackles hard starts, lost acceleration, and rough idling. This is not a product packed with bells and whistles, however. It has, for example, no ability to work with anything but gas engines – no cross compatibility here. What it does have is the cleaning power derived from a carefully formulated recipe that Hi-Gear has produced in collaboration with a number of vehicle manufacturers. This is not technically an OEM product, but it is about as close to one as you can get without actually being one.

There are no multipack options here either. You buy one can, you pour it into the tank and let it do its job. This product is ultimately very simple and very straightforward. But it is also designed to be extremely effective. That, to us at least, seems like a fair trade off.