HKK Indore Long Punjab Small Mouth Silencer for Royal Enfield J-Series – Chrome & Black

Give your Royal Enfield J-Series motorcycle a long, traditional Punjab-style exhaust appearance with the HKK Indore Long Punjab Small Mouth Silencer. Its extended cylindrical body and smaller 45-size outlet create a cleaner, more restrained rear profile than a Big Mouth Long Punjab silencer.

Choose Chrome for a bright classic finish or Black for a darker custom look. This silencer is made for compatible Royal Enfield Classic 350 Reborn, Bullet 350 J-Series/New Standard and Meteor 350 motorcycles.

Please note: This is an HKK Indore aftermarket silencer. It is not a Royal Enfield genuine or OEM exhaust.

Key Features

• Long Punjab / Long Punjabi silencer design
• Small Mouth 45-size outlet
• Made for compatible Royal Enfield J-Series 350 motorcycles
• Available in Chrome and Black
• Long cylindrical body for a traditional custom appearance
• HKK Indore “Old Is Gold” branding
• Model-specific mounting arrangement
• One rear silencer supplied

Available Variants

Confirmed Compatibility

Important Generation Check

This product is for compatible J-Series 350 motorcycles. Do not order it only by the words “Classic,” “Bullet” or “Standard,” because older UCE motorcycles use a different exhaust layout.

• Classic 350 Reborn: J-Series application
• New Bullet 350 / New Standard: J-Series application
• Meteor 350: J-Series application
• Older Classic, Electra and Bullet Standard: UCE models require a different silencer

Check Before Ordering

Before placing the order, verify:

• Your exact motorcycle model
• Manufacturing year
• J-Series engine generation
• Existing bend-pipe and silencer joint
• Mounting-bracket position
• Clamp, gasket and spacer requirements
• Whether the original catalytic-converter arrangement is retained

Fitment Not Confirmed

• Hunter 350
• Goan Classic 350

These motorcycles also belong to the wider J-Series family, but fitment should not be assumed without confirming the inlet, bracket and clearance.

Do Not Order For

• Classic 350 UCE
• Classic 500 UCE
• Bullet Standard 350 UCE
• Bullet Standard 500 UCE
• Electra 350 / 500 UCE
• Thunderbird 350 / 500
• Himalayan 411 or Scram 411
• Himalayan 450 or Guerrilla 450
• Interceptor 650 or Continental GT 650
• Super Meteor 650, Shotgun 650, Bear 650 or Classic 650

Small Mouth vs Big Mouth

What This Product Is

• One HKK Indore Long Punjab Small Mouth silencer
• A long-body aftermarket exhaust component
• A 45-size small-outlet design
• Available in Chrome or Black
• Made for compatible J-Series 350 motorcycles listed above

What This Product Is Not

• Not a Royal Enfield genuine silencer
• Not a complete exhaust system
• Not a bend pipe or header pipe
• Not a catalytic converter
• Not a Big Mouth Long Punjab silencer
• Not compatible with older UCE motorcycles
• Not a pair of silencers

Design and Finish

The extended Long Punjab body gives your motorcycle a stretched, old-school exhaust appearance. The 45-size Small Mouth outlet keeps the rear profile neater than a large open-mouth design.

The Chrome version is supplied under HKK code HKM5A. The Black version is supplied under HKK code HKM5B.

Sound Expectations

The final exhaust note can vary with the motorcycle, bend pipe, catalytic converter, internal baffle construction, engine condition and installation. A smaller outlet does not by itself guarantee a particular volume or bass level.

Please review the available sound video before ordering when exhaust tone is your main buying priority. No fixed decibel level, exact baffle count or guaranteed sound character is promised.

What’s Included

• 1 × HKK Indore Long Punjab Small Mouth silencer in the selected finish
• Attached mounting bracket

Not Confirmed as Included

• Bend pipe or header pipe
• Exhaust clamp
• Exhaust gasket or sealing sleeve
• Mounting bolt, nut or washer
• Spacer
• Catalytic converter
• Heat shield

Parts You May Need During Installation

• Correct-size exhaust clamp
• Exhaust joint gasket or sealing sleeve
• Mounting bolt, washer, nut or spacer
• The original compatible J-Series bend pipe in reusable condition

Installation Guidance

• Professional installation is recommended.
• Compare the silencer inlet and bracket with the existing exhaust before fitting.
• Ensure the bracket aligns without forcing or bending the silencer.
• Do not drill, cut or weld the silencer before confirming fitment.
• Check clearance from the centre stand, swingarm, rear footrest and brake components.
• Inspect the joint for exhaust leakage after installation.
• Recheck the mounting hardware after the first full heat cycle.

Care and Maintenance

• Allow the silencer to cool before cleaning.
• Use mild automotive shampoo and a soft microfibre cloth.
• Avoid acidic cleaners, steel wool and abrasive pads.
• Dry the finish after washing.
• Remove mud and road contamination promptly.
• Use a finish-safe polish suitable for Chrome or Black.
• Inspect the bracket and clamp periodically.
• Heat-related finish changes may occur near hotter sections during use.

Important Fitment and Return Note

This is an aftermarket exhaust product. Verify your motorcycle model, J-Series generation, manufacturing year, silencer connection, mounting position and required hardware before installation.

Do not start the motorcycle until the product and fitment have been checked. Once installed and used, the silencer may develop clamp marks, mounting marks, carbon deposits, soot or heat-related finish changes.

Compliance Note

Aftermarket exhaust noise and emission requirements can vary depending on the motorcycle configuration and local regulations. No road-use, noise, BS6 or emission approval should be assumed unless supported by product-specific certification.

Frequently Asked Questions

Is this a genuine Royal Enfield silencer?

No. This is an HKK Indore aftermarket silencer for compatible Royal Enfield J-Series motorcycles.

What is a Long Punjab Small Mouth silencer?

It is an extended Punjab-style silencer with a smaller outlet opening, chosen for its traditional long-body appearance and cleaner rear profile.

Which motorcycles does it fit?

It is made for compatible Classic 350 Reborn, Bullet 350 J-Series/New Standard and Meteor 350 applications.

Does it fit the old Bullet Standard 350?

No. The older Bullet Standard uses the UCE platform. This listing is for the newer J-Series Bullet 350.

Does it fit Classic 350 UCE?

No. Choose a UCE-specific silencer for the older Classic 350.

Does it fit Hunter 350?

Fitment is not confirmed. Please do not order for Hunter 350 without matching the inlet and mounting bracket.

Is it available in Chrome and Black?

Yes. Select the required finish before adding the product to the cart.

What is the Chrome SKU?

The Chrome variant is HKM5A.

What is the Black SKU?

The Black variant is HKM5B.

Is this Small Mouth or Big Mouth?

This is the Small Mouth version with the factory description showing a 45-size outlet.

Is this one silencer or a pair?

This listing is for one silencer.

Is this a complete exhaust system?

No. This is the rear silencer only.

Is the bend pipe included?

No bend pipe is shown or confirmed as included.

Is the clamp included?

The exhaust clamp is not confirmed as included. Check your existing hardware before installation.

What sound does it produce?

Sound depends on the motorcycle, internal construction, bend pipe, catalytic converter and installation. Review the sound video before ordering when sound is your main priority.

Will it improve power or mileage?

This product is primarily intended to change the motorcycle’s exhaust appearance and sound. No specific power, torque or mileage improvement is promised.

Can it be returned after installation?

Please review the current Under The Hood return policy before ordering. Installed exhaust parts can show immediate mounting, carbon and heat marks.

Buyer Search Names

• HKK Indore Long Punjab Small Mouth silencer
• HKM5A chrome silencer
• HKM5B black silencer
• Classic 350 Reborn Long Punjab silencer
• Bullet 350 J-Series Long Punjab exhaust
• New Standard 350 long silencer
• Meteor 350 Long Punjab silencer
• J-Series small mouth exhaust
• 45 mouth Long Punjab silencer

Royal Enfield and the listed motorcycle model names are trademarks or model names of their respective owner. This is an aftermarket HKK Indore product and is not a Royal Enfield genuine spare part.