Cat Back Exhaust for Mitsubishi Eclipse (2000-2005) 2.4L

High-Flow Stainless Cat-Back Exhaust for 2000-2005 Mitsubishi Eclipse

What it Does: The Cat-Back Exhaust System replaces the restrictive factory exhaust piping and baffled muffler on the 2000-2005 Mitsubishi Eclipse to reduce backpressure, accelerate exhaust gas velocity, and deliver an aggressive acoustic profile.

The Stock Mitsubishi Eclipse Exhaust Restriction and Corrosion Bottleneck

Factory exhaust assemblies on the third-generation D52A platform rely on narrow-diameter, press-bent aluminized steel tubing riddled with restrictive internal chambers and heavy baffled mufflers. Over time, road salt and continuous thermal cycling degrade the mild steel, rotting flange welds and muffler seams. Mechanically, the factory press bends pinch internal pipe volume by up to 25%, producing parasitic exhaust gas scavenging loss and excessive thermal retention behind the catalytic converter that chokes the naturally aspirated 4G64 powerplant.

The Engineering Solution

Engineered as a direct bolt-on upgrade, this performance cat-back system utilizes continuous mandrel-bent T-304 stainless steel piping to maintain constant cross-sectional area throughout every radius. Smooth internal geometry optimizes exhaust gas velocity (EGV), lowering backpressure to enhance scavenging across the mid-to-high RPM range. Heavy-duty TIG-welded flanges and OE-location mounting hangers eliminate bracket fatigue under high vibrational loads. Completed with a low-restriction straight-through performance muffler and a polished tip, this assembly provides exceptional oxidation resistance, structural durability, and a clean, deep exhaust tone without high-frequency cabin drone.

Technical Specifications

Compatibility

• 2000-2005 Mitsubishi Eclipse RS Coupe 2.4L L4 (4G64)
• 2000-2005 Mitsubishi Eclipse GS Coupe 2.4L L4 (4G64)
• 2001-2005 Mitsubishi Eclipse GS Spyder 2.4L L4 (4G64)

Frequently Asked Questions

Does this fit the D52A Eclipse?
Yes, this is a direct fit for the 2000-2005 Mitsubishi Eclipse equipped with the 4G64 engine.

Will this cat-back exhaust trigger a Check Engine Light (CEL)?
No, because this system bolts downstream of the factory catalytic converter and oxygen sensors, it will not trigger emission-related DTCs or fault codes.

The Mitsubishi JDM Performance Caliber

Tailored specifically for sport-compact tuners, this system uncorks the raw, resonant sound and dynamic rev characteristics that the inline-four platform was engineered to deliver.