Z1 did some testing the weekend before I picked my car up from having the cams installed and they dyno tested the Stillen G3, Z1, and the Admin intake on the same car the same day. The results are as follows:
Stillen 323.75 WHP 265.24 TQ
Z1 323.23 WHP 266.37 TQ
Admin 322.46 WHP 265.34 TQ
I don't know what other mods are on the car, but they swapped intakes, dyno pull, swapped, another pull...you get the idea. I do know this car wasn't cammed, though.
I'd be interested to see a cammed car w/ 3" vs a cammed car w/ 2.5" like Z1. Also, just to play the devil's advocate and
, SOHO has a 2.75" intake in the works.