Why do you want to change to 25 spline? Why don't you change your 25 spline to an 18 spline big bearing case by simply replacing the input spool with a big bearing 18 spline input spool? That's what I did. Then get yourself a 300M 18 spline OS from Supercar and call it a day.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.