Classing Question?

[04WRX]

Last year I was ESP but I changed my springs from STi springs to Epic Springs and added front and rear strut bars since then. Would that change my class?

[SentraWV]

No, you're good for ESP. If you're on street tires, you could run in STX, too.

[04WRX]

thats what i figured. what is the difference between the 2?

[Jason V]

STX is 140 or more treadwear tires... BSP is DOT R compound... STX is stock boost BSP is any boost level on the STOCK turbo. STX requires one cat BSP is open on exhaust no cat required. for specifics the rules are posted in the solo section of SCCA.com