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Spectre HPR9891 High-Performance Conical Air Filter - 6in. Flange / 7.719in. Base / 8.5in. Tall - Red
The Spectre HPR9891 is a large-format conical air filter designed for demanding high-performance intake applications. With a 6-inch flange ID, 7.719-inch base OD, and an 8.5-inch overall height, this is one of the tallest and highest-flowing conical filters in the Spectre HPR lineup. The extra height and swept cone geometry dramatically increase filtration surface area, supporting higher airflow numbers for turbocharged, supercharged, or naturally aspirated high-displacement builds. Constructed with oiled cotton gauze media in a distinctive red finish, HPR9891 is washable, reusable, and ready for serious performance use.
Features and Benefits
- Extra-tall 8.5-inch conical design for maximum filter surface area
- 6-inch flange ID accommodates large-diameter intake tubing
- 7.719-inch base OD for broad, stable base contact
- Oiled cotton gauze media provides filtration with high airflow
- Red finish with anodized caps for premium underhood appearance
- Washable and reusable to reduce long-term maintenance cost
- Rubber seal flange ensures an airtight connection to intake tube
Specifications
| Specification | Detail |
|---|---|
| Part Number | HPR9891 |
| Brand | Spectre Performance |
| Filter Shape | Conical |
| Flange ID | 6 in. |
| Base OD | 7.719 in. |
| Height | 8.5 in. |
| Filter Media | Oiled Cotton Gauze |
| Color | Red |
| Reusable | Yes |
| Warranty | Limited lifetime |
What's Included
- 1 x Spectre HPR9891 Conical Air Filter
Frequently Asked Questions
What is the flange size on the HPR9891?
The HPR9891 uses a 6-inch flange ID, making it compatible with 6-inch OD intake tubes and adapters.
How does the HPR9891 compare to the HPR9892?
Both share the same 6-inch flange and similar base OD, but the HPR9891 is taller at 8.5 inches versus 7 inches, offering more filter media surface area and higher peak airflow potential.
Is the HPR9891 reusable?
Yes. Clean with Spectre filter cleaner, allow to dry fully, apply Spectre filter oil, and reinstall. Avoid over-oiling to protect MAF sensors.
What kind of builds is the HPR9891 best suited for?
This filter is ideal for high-CFM applications including turbocharged, supercharged, and large-displacement naturally aspirated engines using 6-inch intake tubing.
Does this filter come pre-oiled?
Yes, HPR series filters ship pre-oiled and ready to install.
Can I use the HPR9891 in a custom intake build?
Absolutely. Its universal design makes it a popular choice for custom fabricated intake systems, race builds, and air-to-air intercooler inlet setups.
How do I secure the HPR9891 to my intake tube?
Use a hose clamp sized for 6-inch tubing. Slide the filter over the tube end until the rubber flange seats firmly, then tighten the clamp.
What is the warranty on Spectre HPR filters?
Spectre offers a limited lifetime warranty on HPR series air filters against defects in materials and workmanship.
Installation Notes
- Remove the existing air filter and any airbox or inlet components.
- Slide the HPR9891 rubber flange over the 6-inch intake tube end.
- Position the filter so it clears any obstructions in the engine bay.
- Install a hose clamp over the flange and tighten securely.
- Inspect all connections for air leaks before starting the engine.
- Start the vehicle and verify normal engine operation.
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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