linemupz28

I was just wondering how you guys are running 90mm ls3/fast intakes and throttle bodies on ls1 lids pics are a plus thanks.

djfury05

iTrader: (30)

You can use the stock accordion bellow with an aftermarket tb/intake combo. My Nick Williams 92mm tb is actually around 4" outside diameter. The inside diameter (when ported) of the stock tb is 78mm, however the outside is close to 98mm, or 4". 1" = 25.4mm. 78mm = 3.0xxx". So you just get a coupler that is 3" on one side, and 4" on the other, or just use the stock accordion bellow because it is already these dimensions.