When I get enough money, I plan on putting a set of either 370's or 435's in my truck as well as a 62/71 S300. How much would a set of Tim's tubz really help me? I'm all for doing it, (they look real nice anyway) but I want to know how much they really help. I've been told they won't add more hp, but that's not all I care about. Will they help with the airflow, and if so how much will they help?
I'm fairly positive I'm going to get a set, but I have to be able to justify buying these instead of an anniversary present for my girlfriend.
Thanks