HMF PERF SERIES DUAL TURBO BACK BRUSHED CAN - 785-1112Not legal for use in California on pollution controlled vehicles, race use only in California waiver available EQUAL POWER: The Performance Series distributes power evenly throughout the entire RPM range 2 10 dB INCREASE: Depending on the model, you can expect a 2 10 dB increase over stock UNRESTRICTED CORE: The Performance Series uses a 2 1 8 non restrictive core for maximum flow LESS WEIGHT: The exhaust shell is made of T6061 Aluminum that weighs