[yousefnjr]

Just installed a set of CPI catless stepped headers, and I'm hearing a sort of 'whooshing' noise when past half-throttle. I thought maybe something was leaking, but I checked and couldn't find anything. No ticking noises, just a loud 'shhhhhhh' when I'm giving it the beans. Idle noise sounds fine. Is this normal? First time I've put headers on one of my cars, so I don't really know.