SPECTRE PERFORMANCE SPE-3991 Valve Cover Filtered Breather 089601399102

( Brand: Spectre Performance ), ( Manufacturer Part Number: SPE-3991 ), ( Type: Valve Cover ), ( Color: Black ), ( Material: Steel ), ( Vintage Part: No ), ( California Prop 65 Warning: Warning ), ( Performance Part: Yes ), ( UPC: 089601399102 )

Review SPECTRE PERFORMANCE Universal Valve Cover Filtered Breather Black

The Spectre Performance SPE-3991 Valve Cover Breather Kit is an essential upgrade for any performance enthusiast looking to enhance the breathability of their engine. This kit is specifically designed for use with Chevrolet and GM applications, and it replaces the factory valve cover breather system with a more effective and efficient solution.

The kit includes two high-performance valve cover breathers, which are constructed from a durable, black anodized aluminum. These breathers are designed to fit securely over the valve covers, providing a leak-free seal that prevents crankcase gases from escaping into the intake system. The anodized finish not only looks great but also provides excellent protection against corrosion and wear.

Each breather features a large, 3-inch diameter, high-flow filter element. This filter is designed to capture and remove contaminants, such as moisture and crankcase gases, which can negatively impact engine performance. The filter element is made from a high-temperature, synthetic material that can withstand the extreme temperatures and pressures found within the engine compartment.

The Spectre Performance SPE-3991 Valve Cover Breather Kit also includes two 6-inch long, high-flow, silicone breather hoses. These hoses are designed to provide a smooth and unrestricted flow of air, ensuring that crankcase gases are effectively routed to the atmosphere. The silicone material is resistant to oil and other automotive fluids, ensuring a long service life and eliminating the need for frequent replacements.

The installation of the Spectre Performance SPE-3991 Valve Cover Breather Kit is relatively straightforward and can be completed in a few hours by a competent home mechanic. The kit includes all necessary hardware, including clamps and bolts, making it a true plug-and-play solution. The instructions are clear and easy to follow, ensuring a successful installation every time.

In summary, the Spectre Performance SPE-3991 Valve Cover Breather Kit is a high-performance upgrade for any Chevrolet or GM application. It provides improved crankcase ventilation, reducing the amount of crankcase gases that enter the intake system, and helps to maintain proper engine vacuum levels. The durable, anodized aluminum breathers and high-flow filter elements ensure a long service life, making this a worthwhile investment for any performance enthusiast.

Buying a Spectre Performance SPE-3991 Valve Cover Filtered Breather for your vehicle comes with several pros and cons that you might want to consider before making a decision.

1. Reduces Crankcase Pressure: The Spectre Performance valve cover breather helps in reducing crankcase pressure by filtering the gases that escape from the crankcase. This can lead to better engine performance and improved fuel efficiency.

2. Prevents Blow-by Gases from Entering the Intake System: The breather prevents blow-by gases from entering the intake system, which can lead to improved engine power and better combustion.

3. Protects the Intake System from Harmful Gases: The filter in the breather traps harmful gases and moisture, preventing them from entering the intake system and damaging the engine.

4. Easy Installation: The Spectre Performance valve cover breather is easy to install and can be done in a few simple steps.

1. Additional Cost: The Spectre Performance valve cover breather is an additional cost that some may not be willing to pay for.

2. Not a Necessity: While the valve cover breather can improve engine performance, it is not a necessity for the vehicle to run.

3. May Not Fit All Vehicles: The Spectre Performance valve cover breather may not fit all vehicles, so it is essential to check compatibility before purchasing.

The Spectre Performance SPE-3991 Valve Cover Filtered Breather is an excellent investment for those looking to improve their engine performance, reduce crankcase pressure, and protect their intake system from harmful gases. However, it is essential to consider the additional cost and compatibility before making a purchase.

If you are looking to improve your engine performance, reduce crankcase pressure, and protect your intake system from harmful gases, the Spectre Performance SPE-3991 Valve Cover Filtered Breather is an excellent choice. However, it is essential to check compatibility before purchasing and weigh the pros and cons to determine if the investment is worth it for your specific situation.

Details:

Product Line: Spectre Performance Valve Cover Filtered Breathers. Currently in some large metro areas, UPS Mail Innovations is utilizing other service providers for delivery such as Roadie and Veto due to the demand staff shortages with USPS. Part Type: Valve Cover Breather.

Brand new item in original packaging. Brand: Spectre Performance. Shape: Round. Color / Finish: Chrome, plated.

Breather Tube: No. Spectre Performance Universal Valve Cover Filtered Breather Black, SPE-3991 The choice of carrier is determined by the packages size and weight. Attachment Type: Clamp-on.

Manufacturer Part Number: 3991. Diameter: 2.000 in. Fits Valve Cover Hole Size: 0.375 in. Material: Steel.

Grommets Included: No. Shielded: No. Top Style: Plain. PCV Valve: No.

part #: spe3991 prices

• $8.99-$39.99

specifications rockercove:

• brand: Spectre Performance
• mpn: Spe-3991
• type: Valve Cover
• color: Black
• material: Steel
• vintage part: No
• california prop 65 warning: Warning
• performance part: Yes
• upc: 089601399102

seller rockercove:

• rating: 99.4%
• # reviews: 122510
• city: Cleveland, Tennessee

offer rockercove:

• availability: In Stock
• options: Ship-to-home
• started: August 21, 2025
• sold: 0

general rockercove:

• condition: New
• Engines Engine Parts > Valvetrain Components > Rocker Valve Covers

payments rockercove:

• wallet: Apple-pay
• credit card: Diners-club
• other

returns rockercove:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

shipping rockercove:

• class: Economy, Standard, Expedited
• service: Economy, Standard, Expedited
• type: Fixed
• cost: $0.00
• transit: 4-8 Days

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