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last weekend i replaced my spard plugs and they were bone white(running lean) but i burn up a cat every two years, like i am running way rich. im wondering if i may have an air leak in the intake manifold or something. has anyone had this problem. im getting to the point where i am going to put in my test pipe and run it until i have to go through DEQ just to save on buying a cat evey two years.

any help would be nice.
thanks
 

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