Advance Headers | Mild Steel Exhaust Extractors | Mitsubishi L300 SWB EFI 1987-2001 | A341i

PRODUCT CONTENTS:

• 1 x Heavy-Duty Mild Steel Performance Exhaust Extractor Header Assembly
• 1 x Integrated Pre-Welded Oxygen (O2) Sensor Bung

Key Features:

• Equipped with a precision-placed oxygen (O2) sensor fitting to maintain perfect integration with the factory ECU injection fuel mapping out of the box
• Tuned mandrel-bent primary piping pathways ensure completely uniform internal flow geometry, optimizing gas velocity and eliminating heavy factory casting restrictions
• Substantially optimizes low-to-mid range torque delivery—ideal for moving heavy cargo loads, commercial delivery routes, and maintaining highway cruising efficiency
• Heavy-duty mild steel construction structurally built to handle intense under-floor thermal transitions and demanding high-duty commercial operation safely
• Thick, precision laser-cut cylinder head flanges maintain a flat, ultra-stable mating footprint to permanently guard against warping, face distortion, and high-pressure exhaust leaks

Specifications:

⚠️ Crucial Cylinder Head Port & Flange Compatibility Warnings:
1. Oval Port & 9-Stud Exclusion: This product will STRICTLY NOT FIT models optioned with oval exhaust ports and 9-stud cylinder head patterns. It is engineered explicitly for the standard round/symmetrical port configuration layout. Please check your existing engine casting and bolt count prior to purchasing.
2. Wheelbase Profile Mapping: Configured precisely to clear the floor pan, handbrake linkages, and gear selector cables found on Short Wheelbase (SWB) configurations. Long Wheelbase (LWB) vans or flat-deck models should verify under-cab tracking pathways before purchase.

Please Note: Professional installation by an exhaust specialist or qualified commercial mechanic is highly recommended to guarantee proper system alignment and a perfect leak-free seal.