Go to zzperformance website under:
-air intake and fuel delivery
The images for the ported maf sensor is shown with the ported tb's
Do a search for the following on there site:
Pontiac GTP High Velocity Throttle Body Info
You will link to an article with images of the newer maf hump and older maf splitter, they only stage 2 port the newer maf hump although others have done both. This will require the computer be tuned fot the larger area around the mass air flow meter. (zzp suggests this for 12 second 1/4 mile cars)
I would suggest seing if a supercharged tb from the same era 97-98 or 99-03 has the same opening around the mass air sensor, negating the need for a tune, allowing you the benefit from the ported t/b blade.
Originally Posted by 98gtp
