Royal Enfield Meteor 350 Fireball Black Silencer – Old Square CAT System RLX00518/B

Replace a damaged or failed original rear muffler with genuine Royal Enfield RLX00518/B. Factory-described as Silencer Assembly – HR Black, this black stock silencer is used on compatible Meteor 350 Fireball motorcycles equipped with the early exhaust layout that has a separate square catalyst box.

Critical fitment check: This silencer is not for every Meteor 350. Confirm that the motorcycle has the factory black exhaust and the old-style square CAT box system. Later Meteor 350 systems without the square box use the different RLX01296 silencer family.

What This Product Is

• Genuine Royal Enfield rear silencer / muffler assembly
• Exact part number: RLX00518/B
• Factory description: SILENCER ASSEMBLY – HR BLACK
• Black-finish stock replacement silencer
• For catalogue-matched Meteor 350 Fireball black-exhaust applications
• Designed for the old-style system with a separate square catalyst box

Key Features

• Original factory replacement rather than an aftermarket free-flow exhaust
• Model-correct black finish for compatible Meteor 350 Fireball motorcycles
• Maintains factory-style mounting and exhaust routing when correctly matched
• Suitable for replacing a dented, rust-damaged, internally failed or accident-damaged silencer
• Retains stock-type sound character when installed with the correct original exhaust system
• No performance or loud-sound modification is claimed

Confirmed Compatibility

Royal Enfield used more than one exhaust layout within the Meteor 350 production range. Visual inspection of the catalyst arrangement and exact part-number confirmation are mandatory.

Not Compatible / Do Not Assume Fitment

• Later Meteor 350 with the new-style CAT system without the square catalyst box
• Meteor 350 applications specifying RLX01296 or another silencer reference
• Stellar, Supernova or Aurora variants with factory chrome exhaust
• Classic 350 Reborn, Bullet 350 J-Series or Hunter 350
• Himalayan, Scram, Guerrilla or any 450 model
• Interceptor 650, Continental GT 650, Super Meteor 650 or other 650 models
• Aftermarket exhaust pipes, decat pipes or custom mounting arrangements

What You Will Receive

1 × Genuine Royal Enfield Black Silencer Assembly – RLX00518/B

This listing is for the rear silencer/muffler assembly only. Factory packaging and minor appearance details may reflect production revision, but the supplied part number must be RLX00518/B.

Not Included

• Front exhaust/header pipe
• Square catalyst box or catalytic-converter conversion kit
• Silencer guard / heat shield
• Exhaust-pipe guard
• Clamp, joint seal, gasket, mounting plate or dampers
• Oxygen sensor, bolts, nuts or installation labour

Related Exhaust Parts

When Replacement May Be Required

• Silencer body is dented, cracked or damaged after an accident
• Mounting points are bent or broken
• Internal baffles have failed and produce abnormal rattling
• Corrosion or physical damage has created an exhaust leak
• The original black finish and assembly require factory-correct restoration

Abnormal noise can also come from a loose guard, failed joint seal, clamp, catalyst box, mounting damper or header gasket. Diagnose the complete system before ordering the silencer.

Technical Details

Pre-Purchase Checklist

1. Confirm the full part number is RLX00518/B.
2. Confirm the motorcycle is a Meteor 350 Fireball with black exhaust.
3. Look underneath the motorcycle and identify the old separate square CAT box.
4. Do not select the part only by model year or silencer colour.
5. Check whether the existing silencer carries the same number or catalogue reference.
6. Confirm the fault is in the silencer, not the shield, clamp, seal or catalyst box.
7. Check whether any fitting hardware must be ordered separately.

Installation Note

• Allow the complete exhaust system to cool before removal.
• Use a trained motorcycle technician for removal, alignment and tightening.
• Inspect the clamp, 46 mm joint seal, mounting dampers and fasteners.
• Replace damaged sealing components rather than reusing crushed or leaking parts.
• Align the silencer without forcing the mounting bracket or placing stress on the exhaust pipe.
• Tighten all fasteners to the model-specific workshop-manual torque.
• Start the motorcycle and check the joints for leakage, abnormal contact and vibration.

Important Return-Prevention Note

Exhaust parts can look similar while using different catalyst layouts, joint positions and mounting hardware. Confirm RLX00518/B, black finish and the old square-CAT exhaust configuration before ordering.

A correctly supplied silencer is not eligible for return after installation, engine-running marks, heat exposure, scratches, dents, modification or signs of use, subject to applicable law and the current store policy.

Record one continuous unboxing video showing the sealed parcel, shipping label, Royal Enfield label and complete silencer. Report a wrong, missing or transit-damaged item within 24 hours with the video and original packaging.

Frequently Asked Questions

1. What is RLX00518/B?

It is the genuine black rear silencer assembly for compatible Meteor 350 Fireball motorcycles.

2. Does it fit every Meteor 350?

No. It is specifically for the old-style exhaust configuration with a separate square catalyst box.

3. How do I identify the correct exhaust system?

Inspect underneath the motorcycle for the separate square CAT box and verify RLX00518/B in the VIN parts catalogue.

4. Is it suitable for the later straight/dual-CAT system?

No. Later systems use a different silencer family such as RLX01296.

5. Is this black or chrome?

It is the HR Black silencer assembly.

6. Does it fit Meteor 350 Fireball?

Yes, when the Fireball has the catalogue-matched old square-CAT black exhaust.

7. Does it fit Meteor Stellar or Supernova?

Do not order for factory chrome-exhaust variants; those use a chrome silencer reference where specified.

8. Does it fit Classic 350 Reborn?

No compatibility is claimed. Classic 350 uses different silencer references.

9. Does it fit Hunter 350 or Bullet 350?

No. Their exhaust systems and part numbers differ.

10. Is this a performance exhaust?

No. It is a genuine stock replacement silencer.

11. Will it make the motorcycle louder?

It is intended to restore factory-type sound when fitted with the correct original exhaust system.

12. Is the complete exhaust system included?

No. Only the rear silencer assembly is supplied.

13. Is the square CAT box included?

No. The catalyst box is a separate component.

14. Is the black heat shield included?

No. Silencer guard RLX00491 is separately identified.

15. Are the clamp and seal included?

Do not assume so. RLX00875 and 576065 are separate service components.

16. Is the front exhaust pipe included?

No. The front black pipe is separately listed as RLX00513/B where applicable.

17. Can a loose heat shield cause silencer noise?

Yes. Inspect the guard, clamp, dampers and joints before replacing the silencer.

18. Should the joint seal be replaced?

Replace it when crushed, hardened, damaged or leaking.

19. Who should install this silencer?

A trained motorcycle technician should align, seal and tighten the exhaust correctly.

20. What should be recorded during delivery?

Make a continuous unboxing video showing the sealed parcel, label and the silencer from all sides.