I have had the MM c/c plates for two years now. I am constantly making changes with them and have been using 425# front coilovers for road race and autocross. I love them. Look at Steeda and Griggs racing in addition to Maximum Motorsports, as their products are track proven too.
Well I really can't afford the mm, so it's either pro3i or steeda. Take your pic. I actually found the steeda's for $10 cheaper than the pro3i's. Does steeda make good 31 spline axles also? I might as well get them all at the same time to save on some shipping.
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