MXP Comp RS Exhaust System | 2017-2021 Honda Civic Si CoupeMXCRFC3CPB 10th Gen Civic Si Coupe Comp RS Exhaust System by MXP The Comp RS Exhaust System line from MXP introduces a more aggressive sounding system at a lower price. Its the perfect exhaust for those seeking outright performance without the premium cost of other systems. Even though it is a value minded system, the Comp RS Exhaust System line still features many of the same advantages as the SP Spec Exhaust System line. Features Material: T409 401