I'm curious.
Sorry, first post. This site has me pumped to start some aero mods, but after a lot of reading and testimonials I'm still not sold on the HAI/WAI concept. If I knew where this started, I think that'd help me determine the validity.
Thanks
EDIT: I'm not looking to start a debate like in all the other threads - just looking for the source of this trend... was it an enthusiast? An OEM? Just a quick answer will suffice