The HKS Hi-Power SPEC-L exhaust for the Subaru WRX and STI is designed to offer enthusiasts and tuners a good looking, super light exhaust for a reasonable price. Weighing in at just under 23lbs using SUS304 Stainless Steel, this exhaust system is 54% lighter then the stock exhaust system. The aggressive cannonball design with carbon fiber wrapped tips make this one of the best sport mufflers available. Sound (Close): 89dB / Sound (Idle): 71dB. This exhaust system includes silencers, gaskets and hardware required for installation.