Product Summary

Performance Headers EXT349L / EXT349R / EXT349B are a premium exhaust upgrade for Mitsubishi Pajero NM, NP, NS and Montero 3.5L & 3.8L V6 models (2000–2014) fitted with 6G74 and 6G75 engines. Designed as a quality replacement for cracked factory manifolds, this header set improves exhaust flow, sharpens throttle response, increases usable torque, and delivers a stronger V6 exhaust note. Manufactured in 409 stainless steel, these headers suit left-hand drive models and are ideal for street use, touring, and off-road applications.

Product Description

Performance Headers EXT349L – Mitsubishi Pajero NM-NP-NS & Montero 3.5L & 3.8L V6 2000–2014

Performance Headers EXT349L / EXT349R / EXT349B (extractors) are a precision-engineered upgrade for Mitsubishi Pajero NM, NP, NS and Montero 3.5L & 3.8L V6 models built from 2000 to 2014. Suited to vehicles fitted with the 6G74 and 6G75 petrol engines, this system is designed to improve exhaust scavenging, increase torque, sharpen throttle response, and provide a stronger, cleaner exhaust note. They are also an excellent solution where the original factory exhaust manifolds are known to crack or fatigue over time.

Key Features

• Great replacement for cracked factory exhaust manifolds
• Suitable for left-hand drive models
• Designed for street and off-road performance applications
• Mandrel-bent 42mm primary pipes, 51mm secondary pipes, with 57mm flanged outlet
• Thick machined flanges for strength, durability, and leak-free sealing
• Smooth merge collectors for improved scavenging and power delivery
• For three-catalyst models, SNP05 & SNP06 check-engine preventers are required
• No retune or ECU upgrade necessary

Construction

• High-quality 409 stainless steel tubing
• Quality welded construction for durability
• Heat-resistant coating rated to 600°C

Additional Options

• Gasket (DSF158): Available separately for optimal sealing

Fitment Notes

• Suitable for Mitsubishi Pajero NM, NP, NS and Montero 3.5L & 3.8L V6 applications within the listed years
• Left-hand drive fitment
• For a scratch-free install, protect painted surfaces and wrap the headers during trial fitment
• For three-catalyst models, SNP05 and SNP06 check-engine preventers are required
• Verify emissions and registration compliance in your state

What’s Included

• Performance Header Left SKU: EXT349L
• Performance Header Right SKU: EXT349R
• Header Base Pipe SKU: EXT349B
• Secondary outlet flanges with gaskets

Recommended With

• Header gasket: DSF158
• SNP05 check-engine preventer
• SNP06 check-engine preventer

Frequently Asked Questions

Q: What vehicles do these headers suit?
A: They suit Mitsubishi Pajero NM, NP, NS and Montero 3.5L & 3.8L V6 petrol models from 2000 to 2014 fitted with 6G74 or 6G75 engines.

Q: Are these a good replacement for cracked factory manifolds?
A: Yes. These headers are a popular upgrade and replacement option where the original cast manifolds have cracked or become restrictive.

Q: Do they suit left-hand drive models?
A: Yes. This system is listed as suitable for left-hand drive models.

Q: Do I need a retune or ECU upgrade?
A: No. No retune or ECU upgrade is necessary for standard installation.

Q: Are check-engine preventers required?
A: For three-catalyst models, SNP05 and SNP06 check-engine preventers are required.

Q: Is the gasket included?
A: The system includes secondary outlet flanges with gaskets, however the recommended DSF158 gasket is available separately for optimal sealing where required.

Q: Why do headers make a difference on the 3.8L V6?
A: At around 3,500 rpm, the 3.8L 6G75 engine can draw approximately 6,650 litres of intake air per minute. With exhaust gas expansion, that can equate to roughly 17,300 litres of exhaust gas per minute. Better-flowing headers help the engine move that volume more efficiently, improving throttle response and usable torque.

Customer Support

For phone orders, advice, or part enquiries – contact us:

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87A Planthurst Road, Carlton NSW 2218, Australia