Jean,
Three things right off the batt and I might be telling you stuff you already know.
1. On the turbo make sure the exhaust is a standard 4 bolt. Mitsubishi turbo's have the TDO5 flange so you need to be sure the turbo has been converted to a standard 4 bolt unless your going to weld V-clamps and forget about matching bolt patterns...
2. On the OBX manifold. When you purchase the manifold make sure the down-pipe flange is standard 4 bolt or matches your turbo. The down pipe I received was 4 bolt but some flange size that no turbo shop could identify so I had to cut it off and weld on the correct flange.
3. I think you will need some 3" pipe for the turbo intake to air filter |