This is 3" GMS Akrapovic adapter to connect GMS 3" Midpipe to OEM Akrapovic rear exhaust silencer. With this combo you get the best of both worlds. The GMS 3" Modular exhaust components will provide unmatched flow, weight reduction and eliminate the heat soak issues, while Akrapovic, valved rear exhaust silencer will provide stock looking car on the outside and effectively keep the noise dB levels low.
 
This is part of a fully modular GMS 3'' exhaust system and can be combined with all the other GMS exhaust parts you need.