[Jowett Engineering]

The airbox tube where the MAF sensor mounts is about .5" LARGER than stock or the TRD unit.... It then tapers to the throttle body. The supercharger inlet is also larger than the t-body, it expands back out in diameter after it (t-body). One might speculate a larger t-body was in the original plan, but left out to keep the skyrocketing cost of this ultra sweet and complete kit a little more friendly.