Apologies to all,and thanks for the response/feedback. I tend to get self absorbed and take on or tackle too many things at once. To all reguarding Z1 manifold spacer... Bravo, holy-shitezah, and hot damn. It took me the better part of the day with my handicap to install, but I'd gladly do it all over again. A must buy, especially if you've done a cold air intake, and an exhaust upgrade flowmaster/magnaflow, etc. If i had the extra cash i would have gone catback, but I'll entertain that option when Ed Mc Mahon finally sends the money he owes. In other news i figured out my issue with passive crossovers. Parallel wiring made my speakers sound like crap. My current task now is integrating a plug and play dsp amplifire. Its small enough to be cute, but i have had to make my own t harness with an iso y harness combined. The t harness works, and i am waiting for the iso harnesses to be delivered