I would like to add my two cents if you do not mind. An exhaust system is a subject that has many options. Many people have their own experiences and opinions as to what to do and how to get there. So you have to ask yourself what are your objectives? Ground clearance appears to be the most important. Second is performance. (H/X pipe)Third is sound(?) If it were my car: I would go with a high flowing muffler that Tom Hand suggested to me. Dynomax #17725. This is a 2.5" dual inlet/outlet transverse muffler. It will give you the flow (performance) you are after, and the ground clearance. I would look into an H pipe when they get your car up on the rack. If it looks like it might interfere with the trans or hang too low, I would scrap that idea. This muffler should sound similar to your glasspacks. (aggressive/raspy)The Hands have done some extensive track and bench testing of mufflers. Their recommendations are well respected in the Pontiac community. Some "High Flowing" aftermarket mufflers do not flow as well as one thinks! Good luck with your project.
