The Multiquip HS52010451R Foam Pre-Filter is a genuine OEM component designed for HS81A and SHS81A series high-speed cut-off saws. As an OEM part sourced directly through Multiquip, the part is manufactured to the exact specification of the original, ensuring a direct-fit installation with no guesswork. This filter is a straightforward service item that should be inspected and replaced regularly to keep the saw's air intake system performing at its best. DHS Equipment supplies this part backed by Multiquip OEM authorization for buyers who need confidence in fitment accuracy.
Key Features
- OEM Foam Density and Filtration Grade — Produced to the same foam cell structure and filtration rating as the original, so the pre-filter traps airborne particulates at the correct rate without restricting airflow to the carburetor.
- Direct-Fit for HS81A and SHS81A Cut-Off Saws — Shaped and sized to seat correctly in the air filter housing of HS81A and SHS81A sidewinder-style cut-off saws with no trimming or adaptation.
- Protects the Main Air Filter Element — Acts as the first line of defense in the two-stage air filtration system, extending the service life of the inner paper element by capturing coarse dust and debris before it reaches the primary filter.
- Genuine Multiquip OEM Part — Carries the full Multiquip OEM designation, so you receive the same component installed on the machine at the factory — not a generic foam substitute.
- Critical Routine Service Item — A clogged or deteriorated foam pre-filter starves the engine of air, causing rich-running conditions, hard starting, and accelerated wear — regular replacement with the correct part keeps the saw cutting at rated speed.
The foam pre-filter sits at the outermost stage of the air intake system on these cut-off saws, intercepting dust, concrete particles, and coarse debris before they can reach the main paper filter element or the carburetor. Because cut-off saws operate in heavily contaminated environments — grinding through masonry, concrete, and asphalt — this foam element loads up quickly and requires frequent inspection and replacement. When it becomes saturated or torn, contamination bypasses the pre-filter stage and loads the main element prematurely, ultimately allowing abrasive particles to enter the engine and cause accelerated cylinder and piston wear.
Part Details
| Part Number | HS52010451R |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Foam Pre-Filter |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ High Speed Cut-Off Saws (Sidewinder) | HS81A |
| STOW High Speed Cut-Off Saws (Sidewinder) | SHS81A |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
