Exhaust Header for Mitsubishi Mirage (1997-2002) 1.8L

High-Flow Stainless Steel Exhaust Header for 1997-2002 Mitsubishi Mirage

What it Does: The performance exhaust header replaces the restrictive factory cast iron manifold on the 1997-2002 Mitsubishi Mirage to reduce backpressure, optimize cylinder scavenging, and increase exhaust gas velocity.

The Stock Mitsubishi Mirage Exhaust Restriction

The OEM cast iron exhaust manifold on the CJ/CK chassis paired with the 4G93 engine is notorious for thermal fatigue and hairline stress cracks around the primary convergence zones. From an airflow perspective, the factory casting features sharp, unequal-length runners with rough internal walls and abrupt collector angles. This restrictive geometry creates high exhaust gas reversion and uneven cylinder backpressure, choking exhaust gas scavenging and limiting upper-RPM volumetric efficiency.

The Engineering Solution

Constructed from mandrel-bent stainless steel tubing, this header delivers smooth exhaust gas expansion and accelerated flow velocities. The smooth-radius primary runners equalize backpressure across all cylinders, improving combustion efficiency and throttle response. Precision TIG-welded joints and thick, warp-resistant mounting flanges ensure a leak-free seal under severe thermal cycling. The included direct-fit flex pipe decouples engine rocking motion from the rest of the cat-back system, actively preventing stress fractures at the collector.

Technical Specifications

Compatibility

• 1997-2002 Mitsubishi Mirage LS (1.8L I4 SOHC)
• 1997-2002 Mitsubishi Mirage DE (1.8L I4 SOHC)
• 1997-2002 Mitsubishi Mirage Coupe & Sedan (1.8L I4)

Frequently Asked Questions

Does this fit the CJ/CK Mirage?
Yes, this is a direct fit for the 1997-2002 Mitsubishi Mirage equipped with the 4G93 engine.

Does this header include factory oxygen sensor bungs?
Yes, it features pre-welded O2 sensor bungs in the stock configuration for straightforward sensor reinstallation.

The Mitsubishi Sport Standard

Engineered to withstand aggressive track sessions and daily street operation, this stainless header optimizes power delivery throughout the midrange while providing an aggressive, clean exhaust note on the naturally aspirated 4G-series platform.