Cat Back Exhaust for Mitsubishi Eclipse (2006-2009) 2.4L

High-Flow Cat-Back Exhaust System for 2006-2009 Mitsubishi Eclipse

What it Does: The Cat Back Exhaust for Mitsubishi Eclipse replaces the restrictive factory exhaust plumbing from the catalytic converter rearward to reduce exhaust backpressure, increase scavenging efficiency, and enhance acoustic profile.

The Stock Mitsubishi Eclipse Exhaust Restriction and Corrosion Bottleneck

From the factory, the 4G platform suffers from a heavily baffled, chambered steel exhaust network prone to premature oxidation and internal crusting. The OEM plumbing features crush-bent cross-sections that pinch down internal diameter at critical radius transitions, generating localized turbulence and excessive parasitic backpressure. On the naturally aspirated 4G69 powertrain, this bottleneck restricts thermal evacuation at higher RPM, choking scavenging velocity and dulling throttle response across the powerband.

The Engineering Solution

This bolt-on replacement is fabricated using high-grade Stainless Steel tubing to withstand thermal fatigue and road salt exposure. Featuring continuous mandrel-bent piping, the system maintains consistent cross-sectional area throughout its bends, eliminating boundary layer separation and turbulence. Pre-welded OE-style hangers mate directly to factory rubber isolators, while precision-welded flanges seal with the provided high-temp hardware and gaskets, delivering leak-free reliability and a resonant, deep exhaust note without interior cabin drone.

Technical Specifications

Compatibility

• 2006 Mitsubishi Eclipse GS / SE Coupe (2.4L L4 4G69)
• 2007 Mitsubishi Eclipse GS / Spyder GS (2.4L L4 4G69)
• 2008 Mitsubishi Eclipse GS / SE / Spyder GS (2.4L L4 4G69)
• 2009 Mitsubishi Eclipse GS / Spyder GS (2.4L L4 4G69)

Frequently Asked Questions

Does this fit the DK2A Eclipse?
Yes, this is a direct fit for the 2006-2009 Mitsubishi Eclipse equipped with the 4G69 engine.

Will this cat-back exhaust trigger a Check Engine Light (CEL)?
No, because installation occurs strictly downstream of the factory catalytic converter and secondary O2 sensors, OEM closed-loop emissions monitoring remains unaffected.

The Mitsubishi JDM Performance Standard

Built for sport compact enthusiasts, this direct-fit system optimizes exhaust gas velocity to complement the high-revving characteristics of the MIVEC valvetrain, delivering an aggressive tonal profile and responsive low-end torque.