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This is a NEW AND IMPROVED "GN1Performance BILLET ALUMINUM 72mm THROTTLE BODY AND POLISHED UPPER PLENUM" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. With this throttle body and plenum kit you will have a quicker throttle response and faster turbo spool up, not to mention it's Billet Machine finish and polished plenum with custom engraved power 6 look really sharp.
Both items are made in the U.S.A. Plenum only comes in high polished finish, while the throttle body is a machined finish.
