GN1 72mm T/body


Jul 7, 2007
gn1 t body 72mm.jpg
Any thing to be gained from this ? ,, My combo is around 540whp range> "This is a NEW AND IMPROVE "GN1Performance ALUMINUM 72mm THROTTLE BODY 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 plenum kit you will have a quicker throttle response and faster turbo spool up, not to mention it's polished finish with custom engraved power 6 look really sharp.
I have one. I think only a Seat of tge pants feel, no dynotime or factual data. It looks cool sitting on top of ny engine though
It’s great looking piece, but it’s very pricey.
If you have stock plenum adding an RJC power plate will improve the air distribution for considerably less.
GN1 claims there plenum improves air distribution, but I haven’t seen any data published verifying that.
The gain here is you don’t lean out a couple of cylinders.