This is a touchy case to handle, you need to carefully take everything into consideration.
Poor engine building practices cause most failures, however we have seen our fair share of product failures do to poor quality.
If it was a balanced kit from us, we could get the crankshaft warrantied.
This is the toughest thing everybody needs to look at. When your dealing with Chinese or imported products, there is no constancy with any of it..
There is a reason why it is less expensive, you get what you pay for.
All in all, Eagle does have some flaws, but they do make a pretty good product for what you paying for it.
As for the cast cranks, some of them are pretty rough, but they are designed for mild performance.
www.cnc-motorsports.com
Buy threw the site, much cheaper, or call