If you are looking for pure performance without emission control requirements, than 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, 9hp - 11hp power increase over stock exhaust system on stock 4C
Dyno proven, 16hp - 33hp power increase over stock exhaust system on ECU tuned 4C
Next step is GMS 3" Midpipe.
ALFA ROMEO - 4C - 3'' Decat
- Lightweight 640g vs. stock cat (4.200g cat + 620g bracket).
- 9hp - 11hp power increase over stock exhaust system on stock 4C.
- 16hp - 33hp power increase over stock exhaust system on ECU tuned 4C.
- Plug and play.
- Decat system (race use only).
- 3'' / 76mm diameter.
- Simple, minimalistic and effective high flow design.
- Back purged TIG welded.
- Quick release V-band clamps for easy installation.
- T304 Stainless steel.
- Less engine heat.
- Less backpressure.
- Less turbo lag.
- Better throttle response.
- Faster gear shifts.
- Laser engraved GMS logo.
- Requires GMS 3" Downpipe.