This plenum came in a box with a bunch of other stuff when I bought my GN. The TB bore diameter is ~64mm. I think the previous owner said he bought it on eBay but didn't use it because the throttle cable didn't travel properly when installed. I think maybe it was binding because the car has a plenum spacer on it now.
Any advice is always appreciated. I'm running a stock throttle body and plenum for now. I'm trying to decide whether to use the sheet metal upper without the spacer or the stock plenum with a power plate and no spacer.
Any advice is always appreciated. I'm running a stock throttle body and plenum for now. I'm trying to decide whether to use the sheet metal upper without the spacer or the stock plenum with a power plate and no spacer.