Rob'Z 62mm Billet Throttle Bodies are the best option available for the Z32. They are significantly larger than stock, and flow much more air than stock. These are an excellent upgrade to pair with 2.5" intercooler/intake piping and doing them together will eliminate the last restriction in your intake system. In comparison to the 50mm stock throttle bodies, which flow 350 CFMs, these flow 598 CFMs.

Please note that you will need to machine your plenum to suit the larger opening. These will NOT fit with stock intake hoses. These also eliminate the fittings for the carbon canister (driver's side) and EGR/AIVs (passenger side) vacuum ports.