The notorious 390 transmission popping out of gear has been fixed by our friends at Spears Racing.
These transmissions are fully undercut and micropolished for a seamless shift and no popping out of gear ever again!
Comes supplied with full transmission stack assembled, polished shift drum, and new shift forks.
We can accept your old transmission as a core for a $400 refund. If you choose to select this option your new transmission will not be shipped until your old one is recieved NO EXCEPTIONS