5 Point RPM harness (same one the Australian V8 boys use) for autocross use. I use the lower belts (in conjunction with the stock belt) when I tool around town... it really straps your beeeeehind to the car when on the highway.
I bought these over at Bobby Archer's place in FW. Great deal too... if I remember correctly, they were about $75 for the whole set - clearance deal.