I was getting sick of the high pitched whistle of the HKS BOV's so I bought the purple inserts for them. I thought the higher pitch was cool at first but it got annoying after awhile. They sound SOOOO much better with the inserts. It's a nice lower pitch and a little quieter now, just the way I like it. I don't need the added attention from cops and ricers. Just in case anyone else was getting sick of the high pitch whistle this is the way to go (or gutting them).
Follow Ups
Silenced the little "queef" sound from my HKS BOV's today... - P Rock(OH)20:26:35 05/12/03