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      11-10-2012, 01:00 AM   #60
FrenchBoy
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Drives: '09 E90 M3
Join Date: Mar 2006
Location: Seattle, WA

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Quote:
Originally Posted by bigjae1976 View Post
I think something like a KW V3 or TCKline x2 adj setup is in the class of an AST 4250. I believe these JRZs are a step up in terms of performance...and a small step up in price as well.
I am a bit confused. I was under the impression the AST 4200 were similar in spec to the JRZ RS, not the RS1. The AST 4200 and JRZ RS are double adjustable. The RS1 is single adjustable.

What are the main differences between the RS and RS1 in terms of on-track performance and off-track usability?

I am planning to upgrade at some point in the future so I am interested.
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2009 E90 M3 | SG | FR | 6Speed | Akrapovic Evo | JRZ RS1 | StopTech Trophy | Cantrell Brake Ducts