Unfortunately, I have had a bad experience with Windward Performance, and I would advise against getting involved with them. I have bought many parts for several cars from several vendors, and this is the first time I have ever had a problem.
Here is the story: I ordered an H&R suspension set for my 97 twin turbo. They sent me parts of the H&R suspension, and supposed, "upgraded custom (non-H&R) monoballs at no extra charge". I asked them to ship me the correct suspension, but they said "this was the last H&R suspension for this car in the country". The "upgraded monoballs" were obviously used, as the aluminum was scratched. I asked if I could return the parts, since they were not what I ordered. Dan at Winward said no problem, and that my money would be refunded in full(since these were not completely the parts I ordered, and I was not consulted about this swap before shipment). After months of chasing them for a credit to my AMEX, with no returned calls and no faxes, I finally got a credit for 75% of the total $2,800 because they imposed a 25% restocking fee. I called the previously courteous Dan, only to be treated very rudely, and to have him hang up on me. Fortunately I have e-mails from them acknowledging the mistake, so I will be taking this up with AMEX. Should have bought from Gert.......