On board dyno, this is pretty cool.

[racered302]

Looks like a good idea. I wouldn't buy one but I would like to hear about it from someone who did.

http://www.jegs.com/p/AEM/AEM-Dyno-Shaft-Pro-Series-On-Vehicle-Dynamometer/1725271/10002/-1

http://www.youtube.com/watch?v=M4q_7jI0_5Q#t=319

 

[NWBoss]

Looks like a good idea. I wouldn't buy one but I would like to hear about it from someone who did.

http://www.jegs.com/p/AEM/AEM-Dyno-Shaft-Pro-Series-On-Vehicle-Dynamometer/1725271/10002/-1

http://www.youtube.com/watch?v=M4q_7jI0_5Q#t=319

I saw it but the price was prohibitive. It makes perfect sense for a shop owner or for someone constantly testing new ideas to increase HP. When it becomes less expensive and drive shaft manufacturers start offering them as an option of custom one-piece DS then it will spread and a lot of the BS claims of increased HP by adding/changing part X will be proved to be false. Might improve the aftermarket industry's level of sincerity.