If you want good low end and good mids go with 2.25". If you want good high and less low end and mid go with 2.5" If you have turbo go with 2.5". Headers depend on what model you have. -GT, go with Hotshot -GTS, go with Trial
CelicaHobby.com is an independent Toyota Celica enthusiast website. CelicaHobby.com is not sponsored by or affiliated with Toyota Motor Sales, USA, Inc. in any way. The Toyota and Celica names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.