BRAND NEW! MSRP for the RM-01A Cat-Back is $1060. The RM-01A Exhaust System weights a mere 11.2KG vs. 17.1KG for the Stock. RM01A is complete stainless steel competition exhaust. Developed for use in Auto-X, Gymkhana, Rally-X and for high performance street applications. Most applications will see a 50% decrease in weight over OE exhaust systems while increasing both mid range power and torque.