Ok, I've read all 4 pages and most of the car's listed are not great for street class spl. With the exception of the CRX, Yaris are proven to be the loudes street class car's. Other cars that have been tested and with some work can be just as strong are Yugo, VW golf 90-04 2 door. Only problem with the VW golf 01+ model is the frequency is to low @ 51hz to be a great spl car but it's a killer street beater. Problem with the integra, eclipse and similar cars are the hatch itself. It has a very heavy slope on the hatch which is very low and causes issues with getting loud. There was an older chevy hatchback that I saw once that looked like it had potential but don't remember the name of the car. Good luck.
