If you are looking for pure performance without emission control requirements, then choosing our 3'' Modular exhaust system - Decat is the right choice.
 
This decat component is a part of a fully modular GMS 3'' exhaust system and can be combined with all the other GMS exhaust parts you need.
 
Dyno proven, 7hp - 11hp power increase over stock exhaust system on stock 4C
Dyno proven, 16hp - 23hp power increase over stock exhaust system on ECU tuned 4C
 
As a heat management solution, you can choose classic heat wrap or high end SLR heat shielding - A high quality fully welded, Inconel alloy sheets for full encapsulation of exhaust components and for ultimate heat management.
 
Next step is GMS 3" Midpipe.