The EAZ Silman LSA4B Short Punjab Big Mouth Silencer is an aftermarket Free Flow Exhaust designed for Royal Enfield motorcycles equipped with the UCE (Unit Construction Engine) platform.
Its Short Punjab + Big Mouth design gives the motorcycle a bold and aggressive custom appearance. The wider outlet is designed to produce a deeper, bass-rich and more pronounced exhaust note compared with a conventional stock-style silencer.
The compact short-bottle design changes the rear profile of the motorcycle while the black finish provides a stealthy and sporty appearance, making it particularly suitable for blacked-out Royal Enfield builds.
The silencer is designed for compatible Classic 350/500, Standard 350/500 and Electra UCE models. The EAZ listing specifies a heavy-duty mounting bracket and adaptor bush for installation.
Key Features
- Brand: SILMAN
- Model / Code: LSA4B
- Design: Short Punjab
- Outlet: Big Mouth
- Type: Free Flow Aftermarket Silencer
- Finish: Black
- Short-bottle compact design
- Wide Big Mouth outlet
- Deep and bass-oriented exhaust character
- Aggressive custom appearance
- Heavy-duty mild-steel construction
- Black finish for a stealthy look
- Designed for Royal Enfield UCE models
- Suitable for Classic, Standard and Electra
- Mounting Bracket & Adaptor Bush Included
Compatibility
Royal Enfield UCE Models
- Royal Enfield Classic 350 UCE
- Royal Enfield Classic 500 UCE
- Royal Enfield Standard 350 UCE
- Royal Enfield Standard 500 UCE
- Royal Enfield Electra 350 UCE
The EAZ product listing specifically identifies the Short Punjab Big Mouth Black silencer for these UCE applications.
Important Fitment Note
This LSA4B is intended for the UCE exhaust platform.
It should not be assumed to be a direct-fit silencer for J-Series motorcycles such as:
- Classic 350 Reborn
- Meteor 350
- Hunter 350
- New Bullet 350
For J-Series motorcycles, use a J-Series-specific exhaust/silencer.
Application
Suitable for:
- Royal Enfield Classic 350 UCE
- Royal Enfield Classic 500 UCE
- Royal Enfield Standard 350
- Royal Enfield Standard 500
- Royal Enfield Electra 350
- Short Punjab customization
- Big Mouth exhaust conversion
- Free-flow exhaust upgrade
- Stock silencer replacement
- Custom Royal Enfield builds
- Blacked-out motorcycle styling
Product Specifications
| Specification | Details |
|---|---|
| Brand | SILMAN |
| Model | LSA4B |
| Product Type | Free Flow Silencer |
| Design | Short Punjab |
| Outlet | Big Mouth |
| Finish | Black |
| Material | Heavy-Duty Mild Steel |
| Platform | Royal Enfield UCE |
| Compatibility | Classic, Standard & Electra |
| Mounting | Bracket + Adaptor Bush |
| Type | Aftermarket Custom Exhaust |
Package Contents
- 1 × EAZ Silman LSA4B Short Punjab Big Mouth Black Silencer
- 1 × Heavy-Duty Mounting Bracket
- 1 × Adaptor Bush
The EAZ listing specifies the mounting bracket and adaptor bush with the product.
Installation
Professional installation is recommended.
Before installation, check:
- Bend-pipe/header compatibility.
- Silencer inlet diameter.
- Correct positioning of the adaptor bush.
- Mounting bracket alignment.
- Clearance from tyre, frame and foot controls.
- Proper tightening of all mounting hardware.
- Exhaust leakage after installation.
After installation, inspect the exhaust joint carefully for leakage and excessive vibration.
Important Note
This is an aftermarket SILMAN Free Flow Silencer and is not a Royal Enfield Genuine OEM exhaust.
Free-flow exhausts can change the motorcycle’s exhaust sound and characteristics. Actual sound and performance can vary depending on the motorcycle, bend pipe, engine condition and other modifications.
Please ensure the exhaust setup complies with applicable noise and emissions regulations before road use.
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