its bigger we think the specs are pretty much un known on this turbo. i went to the turbo shelf pulled housings, wheels, center sections from several turbo's and put it all together. Di some testing then changed the compressor houseing and wheel to the current.
there is a huge size differance. Been told that im crazy for such a big turbo. But hell its working great and some say it pulls harder than toms car. Yet has a pretty good spool for such a big turbo. SO i guess its all in the behind the scenes work to make the project come together.