I recently purchased a set of 500HP insane axles. I'm getting vibration under acceleration. Is anyone using these axles? I know about swapping inner cups on old axles but these are brand new. Any suggestions?

 

Did you notice if the axles were solid or hollow? Are they as thick as the factory axle?

 

They are not as thick as the stock axles. I'm not sure if they are hollow or solid.

 

If they are not as thick then they are most likely solid axle shafts, this is why you have a vibration. Solid shaft axles are more susceptible to vibration in our car then the factory hollow axle. The vibration issue comes up quite often after someone has replaced their axles. Do a search on the site it's very common and annoying at the same time.