Air filters
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'79 300D, '85 300Dt, '99 CLK430
Air filters
I have searched the forums and read most about how the K&N filters lets more dirt in than ITG, but how does this effect the long term damage to the engine? Is ITG the best way to go besides stock, to do minimal damage to the engine? The K&N filters have helped with my mpg, but will ITG also help? Any input is appreciated.