On Fri, 21 May 2010 12:15:37 -0500, cdenk said: > Racing modifications come in to classes of issues: > Safety: On the road, tires must meet DOT (Federal Department of > Transportation) specifications (could meet racing regulations also) would > be the more obvious one > Emissions: Exhaust systems, intake systems (carb or injection), and > others must meet the appropriate regulations. After market (racing) > equipment is available that meets the appropriate emmissions regualtions > and comes with a certificate stating that. California has stricter > regulations, and for vehicles registered there, must meet the > requirements. Understood, however, Peter suggested wanting special markings on the outside of the car. Why? And why single out cars with performance modifications? I have Porterfield brake pads, why would I need to warn other drivers, yet the car with worn-out brakes travels invisibly? This is kind of a dumb offshoot of a mostly obvious thread, I don't know why I am even bothering to participate, but I would like to hear from Peter what his thoughts were. Cheerful regards, Bob -- http://www.fastmail.fm - A fast, anti-spam email service. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist