http://www.knfilters.com/faq.htm#7
9. Should I install the largest K&N filter that will fit in my race vehicle?
If an existing K&N filter is large enough to provide negligible restriction, a larger than required filter will not affect the amount of air an engine can take in, however, it will lengthen the filter’s service interval. A longer service interval can be an important factor when racing in dusty, dirty environments.
Installing a "too big" air filter will not cause another restriction...... money could be spent more effeciently in other area's but it does not create another restriction.
Matt is correct.
BTW, good luck w/ the new intake set up
