Cobb Stainless Steel Cat-Back Exhaust — 2008-2015 Mitsubishi Evo X
The Cobb Stainless Steel Cat-Back Exhaust for the 2008-2015 Mitsubishi Lancer Evolution X is a mandrel-bent 304 stainless steel exhaust system for the 4B11T turbocharged platform. Improved exhaust flow over the factory system reduces backpressure at the turbocharger, complementing the Cobb Accessport calibration and intake work on the Evo X.
DETAILS
- Platform: 2008-2015 Mitsubishi Lancer Evolution X 4B11T MT
- Material: 304 stainless steel — mandrel bent throughout
- Improved exhaust flow — reduced backpressure for 4B11T turbocharger
- Sound: purposeful improvement over stock without excessive drone
- All hangers, gaskets, and hardware included
- NOTE: Ships via UPS/FedEx — signature required at delivery
4B11T Exhaust: Completing the Accessport Calibration Package
Cobb’s stainless steel cat-back exhaust uses mandrel-bent 304 stainless steel tubing throughout — mandrel bending maintains consistent tube diameter through bends rather than collapsing the inner radius, which eliminates the flow restriction that crush-bent exhaust tubing creates. The smooth, consistent bore allows spent gases to exit with minimal turbulence and backpressure. The reduction in backpressure has a direct effect on turbocharger performance: lower exhaust backpressure means the turbocharger can spool more freely, reaching boost targets faster and maintaining them with less effort from the engine. The stainless steel construction resists the corrosion and scaling that degrades factory and lower-quality aftermarket exhaust systems over time.
Stainless Construction, Sound Character, and Evo X Fitment
The cat-back connects at the catalytic converter outlet and runs through the mid-pipe and resonator to the rear muffler and exhaust tips. Cobb designs the entire system as a matched assembly — the mid-pipe diameter, resonator volume, muffler packing, and tip size are all specified together to achieve a particular sound character and backpressure target. The result is a system that sounds intentional rather than arbitrary: louder and more purposeful than stock without the drone that comes from an inadequately designed resonator. All hangers, gaskets, and hardware for the complete installation are included.
What’s in the Box
- Cobb stainless cat-back exhaust system
- All hangers, gaskets, clamps, and hardware
Why Choose Cobb Tuning
Cobb Tuning has been developing performance software and hardware for turbocharged enthusiast vehicles since 1999. Founded in Austin, Texas, Cobb built its reputation on the Accessport and expanded into a full catalog of hardware engineered to complement it. Every OTS map is developed in-house on real vehicles, and every hardware product is validated as part of a complete system — not sourced and sold in isolation. That integrated approach is why Cobb produces consistent, reliable results across the builds we see every day.
The RallySport Take
The Cobb stainless cat-back for the 2008-2015 Evo X is the correct exhaust upgrade for 4B11T builds running the Cobb Accessport. The improved exhaust flow complements the intake and calibration work that makes the 4B11T perform at its potential — the cat-back addresses the remaining factory restriction in the system. The Evo X is a platform that responds well to the complete package of calibration, intake, and exhaust working together, and the Cobb cat-back completes that picture.
Fitment
| Year | Make | Model | Notes |
|---|---|---|---|
| 2008-2015 | Mitsubishi | Lancer Evolution X | 4B11T MT |
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