Sorry, mopar2ya, I got shut out of the site last night. Don't know if it was my connection, or something with the site. So basically more air flow in, more air flow out. The existing exhaust system can't handle this? Yes, I have seen the info on the zoomers and they will be the next step, but can I do the C&L now and wait for the Zoomers (prob. next summer)? Thanks.