Mitsubishi Lancer Evo X Downpipes – Catted & Decat Performance Exhaust Upgrades

Mitsubishi Lancer Evo X Downpipes – Unlock Extreme Performance

Mitsubishi Lancer Evo X performance downpipes are one of the most effective upgrades for turbocharged 4B11T engines. Installing a high-flow Evo X downpipe transforms performance, turbo response, and exhaust sound — whether you're running a street-friendly setup or a full-stage build.

Why Upgrade to an Evo X Performance Downpipe?

The factory downpipe on Evo X is fairly restrictive, typically 2.5-inch in diameter, limiting exhaust efficiency and turbo spool. Upgrading to an aftermarket downpipe offers:

• Increased horsepower & torque — optimizing flow improves power delivery.
• Faster turbo spool — less lag, sharper throttle response and improved driveability :contentReference[oaicite:3]{index=3}.
• Enhanced exhaust tone — choose catted for a deep but refined growl or decat for raw, motorsport levels of sound.
• Lower EGTs — better thermal efficiency for reliability under load.
• Essential for ECU tuning — key part of Stage 1 and Stage 2 builds.

Types of Evo X Downpipes

Your choice depends on tuning needs and emissions regulations:

Catted Downpipes

These include a high-flow catalytic converter to balance performance with street legality.

Decat Downpipes

Designed for unrestricted flow — ideal for track/race cars or builds in regions without emission checks.

Material Options: Stainless Steel vs Titanium

• Stainless steel — durable, cost-effective, corrosion-resistant.
• Titanium — ultra-lightweight, superior thermal properties, premium motorsport finish.

Key Downpipe Upgrades for Evo X

• AMS “Widemouth” Downpipe — engineered for robust flow and longevity :contentReference[oaicite:4]{index=4}.
• ETS Recirculated Downpipe — CNC-tapered flange, smooth exhaust velocity, and balanced sound :contentReference[oaicite:5]{index=5}.
• General recommendation: upgrading from 2.5″ stock to 3″ or larger dramatically improves spool and performance :contentReference[oaicite:6]{index=6}.

Performance Gains with Evo X Downpipes

Users consistently report:

• Noticeable power and torque increases across the rev band.
• Smoother, faster turbo response.
• More aggressive and dynamic exhaust note.

Higher-end options like the ARTEC 3.5″ cast dump/front pipe can deliver gains of up to 20 kW (~27 HP) over 3″ alternatives :contentReference[oaicite:7]{index=7}.

Choosing the Right Diameter

• 3-inch downpipes — recommended for Stage 1/2 setups and improved flow.
• 3.5-inch or larger — ideal for high-boost or motorsport builds aiming for maximum gains :contentReference[oaicite:8]{index=8}.

Build Quality & Engineering Excellence

• Mandrel-bent tubing for smooth, unrestricted flow.
• Precision TIG welding for strength and durability.
• OEM-style flanges for reliable, leak-free installation.
• Premium finishes—stainless or titanium—available.

Perfect Integration for Tuning & Motorsport Builds

Evo X downpipes are a must-have for serious builds:

• Essential for ECU tuning, hybrid turbos and high boost targets.
• Compatible with upgraded intercoolers, test pipes, and full exhaust systems.
• Optimizes EGTs and heat management under demanding conditions.

Conclusion

Upgrading to a performance Mitsubishi Lancer Evo X downpipe unlocks the turbo’s full potential: more power, quicker spool, and a deeper, sportier sound. Whether you go for a catted version for street compliance or a decat for pure performance, premium options like AMS “Widemouth” or ETS give proven results. Choose the right diameter, material, and design—and take your Evo X to the next level.