I was told by ZXRage that I would need to change the rear axle in order to handle the goals I want. Here's a place that sells rear axles: http://web.inetba.com/dss/item158471.ctlg I believe one of these is used on the Performance Motorsports 350Z. Level 5 hold 800hp, so i'm not sure what they used. Sorry if it's a repost, but I don't believe i've ever seen anything about this before.