Am thinking about running my EB on straight gas as my extractors are race style so the cat is very low.....So instead of forking out for new cat and headers i'm wanting to just go straight gas as apparently the cat is not required on a straight gas car I have heard....But, i was told yesterday at a zorst shop that an engineer has to check your car to make sure the tank, lines etc are out and car is safe......Anyone know the law for sure, and how much will a check cost???