i'm thinking about getting the visu-filter "fuel catalyst filter" for 14.99 ---- it says it 10-12% increase in throttle response and accel. -- 5-15% more gas mileage and it reduces harmful carbon by about 65% ---- should i put this on my 02 400ex??? --- any help would be great - thanks.

 

Sounds like snake oil to me.
But i cant remember where i saw a report that there was a slight mpg increase.

 

it's from dennis kirk.