I own a 2000 v6 mustang. Its a manual and ive not done much to the cars engine at all. The reason is i'm not sure where to start. I want to get the most horsepower for the cheapest (doesn't everybody). I'm willing to spend around 400-500 bucks or so but i'm not sure what to get. I'm wondering if getting a cold air intake off ebay for $70 bucks would do the same as a $190 mac cold air intake system. Besides getting a cold air intake, what parts (brands included) should i invest in to maximize my cars performance for under $500. Thanks for reading my post.