Where can i find high performance but low cost car parts?

im looking to upgrade my car with some new parts. i was wondering if anyone could share their knowledge on where to find parts. Also, if you could suggest a few places to pick up body kits like the ones from VeilSide, that would be appreciated.|||Don't waste your money on cheap parts. If you really want your car to perform well you're going to have to pay for the good parts. Go on Google and find some forums for your car. See what the hardcore fans are putting in their cars and where they're getting their parts from. Where ever that is would be your bet bet on getting quality parts. You could always use eBay but there have been quite a few poor experiences with eBay parts not fitting and whatnot.|||go fast parts cost money, no way around it, summitracing.com.