Is worldwide performance parts legit?

I am looking at that same vendor and had the same feeling you did. Too good to be true prices and no phone number on their website. I’m getting a barkers dual set and WPP is the cheapest by over $100. I looked up the business on google and found a phone number for them and called. They seem to be legit. The guy said they don’t have any stock, they just drop ship everything so they are just a reseller but their prices are about 12% lower than everyone else. They have a Facebook store as well. I went back about a year on the posts and gave up trying to find the beginning of it, literally over 500 posts when I gave up. If it is a scam they sure have put a lot of effort into making everything seem legit. I looked up the business and they have been open for 18 years (2005) or at least some company with that name has been.