Just type in z1 customer service Or click on this[ http://www.twinturbo.net/ttnetsearch/search.aspx?forum=general ] You can make your own educated decision.
www.SoCalZCrew.com
 **Dynoed at 371.2 rwhp. and 362.3 rwtrq. @ .9 bar on pumped 91 gas no time tweaking 3/11/03** **Dynoed at 411 rwhp. and 452 rwtq. @1.15 kg. on race gas 104 no time tweaking 3/28/03 **All numbers are SAE corrected**
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