Turbo99GT or anyone that knows
 

When you installed your TDC stage II, did you strap on an exhaust system as well? Do cat-back exhaust systems work with the y-pipe? Also, if I were to get stage I now, but want stage II later, after I modify my suspension and stuff throughout the years, will I be able to upgrade? If you can't answer this last question, it's cool. I would really appreciate your help on this, or anyone else's help if they know about this. Thanks!!

The kits come with all of the parts to hook up to the existing Cat-back exhaust system. I left my Borla cat-back system in when we did the install. As far as upgrading the kit later, I'm not 100% sure. I personally have not seen a stage I kit, but I have seen the Stage II, IIx & IIxx kits up close and installed. It might be better to speak to Joey at www.jadeperformance.com since he has more experience installing them on 4.6s than probably any other independent shop.

Thanks! I emailed them as well as signed up for their forum. I appreciate your help man!!