Well i just actually got a set of stock ported manifolds in 2day. Im thinking of looking for these Mike Smith exhaust manifolds for prices. How much do you think this will reduce my lag? What kind of manifolds are you running? Joe i appriciate all your help and suggestions. I wish I had more people around sc with z's. Dont have much time left in the states to travel to test the waters. I found a nice deal on 675 and dp for 2400 new. Thinking of just grabbing those but just worried about lag cause I definatly wont be a track whore. Thanks MIKE