Size comparisons[ http://www.twinturbo.net/net/viewmsg.aspx?forum=general&msg_id=2249172&forum=general&dtSearch=1 ]
Efficiency data[ http://www.twinturbo.net/net/viewmsg.aspx?forum=general&msg_id=2361126&forum=general&dtSearch=2 ]
Dimensions and flow[ http://www.twinturbo.net/nissan/300zx/forums/general/view/2358209/I-would-still-like-to-see-a-test-of-efficiency-on-the.html ]
Make your own decision after thumbing thru those numbers.
However since we're mostly sheep here, I'd say buy the Ashspecs too.
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