I just purchased my first car! It's a 2002 Volkswagen GTI 1.8T. It has bunches of upgrades in it so I won't have to ever put anything in it.... But it doesn't have a catalytic converter which causes the engine light to come on. I had my mechanic check it out and he said everything was in perfect working order but he recommended purchasing a catalytic converter. I don't make much money and I'm only going to purchase it if I NEED it, any help would be epic. Thanks!