Which coilovers should you choose?

AST Suspension 5100 vs 5200 vs 5300 - Which Coilovers Should You Choose? For years, AST has been a powerhouse in the world of performance suspension. From fast street cars to serious track tools, the Dutch brand is known for quality, precision, and incredible control at high speeds. But within the AST coilover line, there are three popular series that many drivers struggle to choose between.