I'm not sure about the celica, but I put headers on my last car, and it didn't really make them tremendously louder like when you put a really open exhaust on your car, the headers just made the exhaust sound like it had more depth, and helped the exhaust note stay deep throughout the RPM range...
dam i dont want the deep sound and i realy dont want it to stay at all the rpms
i have enough trouble with the po - po
does anyone one know about the celica headers and the sound.. better yet does anyone know if it gets louder on the exhuast i got the reason im specifing it , is because its straight pipe , no cat all . ect..