Nick Williams 102mm Throttle Body (Drive by Wire) LS1 LS2 LS3 LS6 LS9 LSA LS7 SD102MMEL by Hinson Motorsports Inc. Nick Williams is known for making some of the highest quality throttle bodies on the market. This throttle body has a 4.23" OD, so you'll want to use a 4.25"coupler. No harness required on LS2/LS3/LS7 applications Nick Williams 102mm Throttle Body (Drive by Wire) LS1 LS2 LS3 LS6 LS9 LSA LS7 Adapter Harness needed for LS1 installations