MACE 69MM BORED OUT THROTTLE BODY TO SUIT HOLDEN CAPRICE WH.II WK ECOTEC L36 3.8L V6Installing a bored out throttle body is a very cost effective way to bump up the performance of your Ecotec or L67 supercharged 3. 8L V6 engine by increasing airflow by 14%. Designed and manufactured by a team of qualified mechanical and automotive engineers, so you can be assured of the outstanding quality and workmanship of these throttle bodies. The photo does NOT do these throttle bodies justice! Through different testing procedures, gains of