When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
So leave the stock on on its not going to hurt anything? it does make a wistle i thinks its cause the airflow from the intake trying to go into that small throttle body then in to the plenum
if anything just get a bigger tb. not sure what size the k&n pipe is. but the 75mm works good for me. depending on the k&n you might just go for a 70mm tb. probly would worry about a mid pipe and gears before that though.