russ_g wrote on 12/31/69 at 16:00:05:"performance" just means better than stock to me - had to call them something I guess. Anyway thanks for the info - I'll search on the info you've posted.
LOL, then you could basically just put some springs on it to fit that definition.
Seriously though, the 412's are a big improvement, the 418's would be even better and the 440's are the cushy upgrades. Of course, unless you get a great eBay deal, there's a pretty big price difference too. I have the 412's on mine and like them a lot.