no they're nice to have. i have a 60mm jeep throttle body just remember to port out your intake manifold to match it.
dsm/mitsubishi service manuals https://www.mediafire.com/folder/5k14qlaulb9s1/dsm_mitsubishiservice manuals(my whole collection) https://www.mediafire.com/folder/ac51jwwa3g1n1/automotive_manuals