The Injen Hydroshield Black Air Filter Pre-Filter (1118BLK) is a protective air filter wrap designed to help shield compatible aftermarket intake filters from water, dirt, dust, and other airborne contaminants. Engineered to provide an additional layer of protection without significantly restricting airflow, the Injen Hydroshield is an excellent accessory for performance vehicles equipped with exposed air filters or aftermarket cold air intake systems.

Manufactured using a durable, water-repellent material, the Hydroshield fits over the existing air filter to help prevent moisture and larger contaminants from reaching the primary filtration media. Its hydrophobic construction helps repel water droplets while allowing intake air to pass through, making it particularly useful for vehicles driven in wet, dusty, or unpredictable road conditions.

Unlike a conventional replacement air filter, the Injen Hydroshield is designed to work alongside the vehicle's existing performance air filter. It provides a supplemental protective barrier that can help reduce contamination buildup and extend the service interval of the primary filter under certain driving conditions.

The black finish provides a clean, understated appearance that complements a wide range of aftermarket intake systems. Its flexible construction allows convenient installation over compatible closed-top, cone-style air filters without requiring modifications to the intake system.

Whether protecting an exposed short ram intake, maintaining a cold air intake system, or adding extra filtration protection to a daily-driven performance vehicle, the Injen Hydroshield 1118BLK delivers a practical solution for helping preserve intake filter cleanliness and performance.

Features

• Water-Repellent Hydroshield Material: Hydrophobic construction helps repel water droplets before they reach the primary air filter.

• Additional Filter Protection: Provides an extra barrier against dust, dirt, road debris, and airborne contaminants.

• Airflow-Friendly Design: Engineered to allow intake airflow while providing supplemental protection.

• Black Finish: Offers a clean appearance that complements aftermarket performance intake systems.

• Flexible Protective Wrap: Fits over compatible air filters without requiring permanent intake modifications.

• Closed-Top Filter Compatibility: Designed for appropriately sized closed-top performance air filters.

• Helps Reduce Filter Contamination: Limits direct exposure of the primary air filter to larger airborne debris.

• Cold Air Intake Protection: Particularly useful for compatible intake systems with filters mounted in exposed locations.

• Short Ram Intake Compatibility: Can also be used with properly sized exposed filters in engine bay intake configurations.

• Simple Slip-On Installation: Installs directly over the existing air filter.

• Reusable Construction: Can be removed for inspection and maintenance according to the manufacturer's recommendations.

• Universal Fitment by Dimensions: Suitable for compatible air filters regardless of vehicle make or model.

• Injen Performance Engineering: Designed as an accessory for performance air intake applications.

Popular Performance Applications

• Honda and Acura Cold Air Intakes: Provides supplemental protection for compatible exposed air filters used in performance intake systems.

• K-Series Engine Swaps: Suitable for properly sized intake filters installed on custom K20 and K24 engine swap configurations.

• B-Series Performance Builds: Helps protect compatible aftermarket air filters on modified B16, B18, and B20 engines.

• Turbocharged Applications: Can be installed over appropriately sized air filters used with aftermarket turbocharger intake piping.

• Short Ram Intake Systems: Adds protection to exposed cone-style filters in the engine compartment.

• Daily-Driven Performance Vehicles: Helps reduce direct exposure to dust, road debris, and light moisture.

• Wet Weather Driving: Provides an additional water-repellent barrier for compatible performance air filters.

• Custom Intake Fabrication: Suitable for universal intake configurations using an air filter that matches the Hydroshield's dimensions.

• Performance Air Filter Maintenance: Helps keep the primary filter cleaner between routine inspections and servicing.

Additional Information

• Manufacturer: Injen Technology
• Part Number: 1118BLK
• Product Series: Hydroshield
• Product Type: Air Filter Pre-Filter / Protective Wrap
• Color: Black
• Material: Water-Repellent Synthetic Fabric
• Filter Style: Closed-Top Air Filter Wrap
• Base Diameter: 7 Inches
• Top Diameter: 5 Inches
• Height: 7 Inches
• Installation Type: Slip-On
• Vehicle Fitment: Universal, Based on Air Filter Dimensions
• Primary Air Filter Included: No

Fitment Information:

The Injen Hydroshield 1118BLK is designed for compatible closed-top air filters with the following approximate dimensions:

• Base Diameter: 7 inches

• Top Diameter: 5 inches

• Filter Height: 7 inches

This is a universal accessory rather than a vehicle-specific replacement component. Fitment depends on the physical dimensions and shape of the existing air filter.

Important: The Hydroshield is water-repellent, not waterproof. It does not make an exposed cold air intake safe for driving through deep standing water or flooded roads and cannot eliminate the risk of engine hydrolock.

Common Reasons for Replacement

• Water Exposure Concerns: Helps reduce direct moisture contact with an exposed aftermarket air filter.

• Dusty Driving Conditions: Provides an additional protective layer against airborne dust and debris.

• Road Debris Protection: Helps prevent larger contaminants from directly contacting the primary filter media.

• Cold Air Intake Maintenance: Adds supplemental protection to filters mounted in exposed locations.

• Dirty Air Filter Conditions: May help reduce the rate at which debris accumulates on the primary filter.

• Daily Driver Protection: Provides additional intake filter protection during regular street use.

• Performance Intake Upgrades: Complements compatible aftermarket cold air and short ram intake systems.

• Damaged Existing Pre-Filter: Replaces a torn, worn, or deteriorated protective filter wrap.

• Custom Intake Installations: Offers a universal protective accessory for compatible aftermarket air filters.

Installation Notes

1. Verify Filter Dimensions: Measure the existing air filter to confirm compatibility with the Hydroshield's 7-inch base diameter, 5-inch top diameter, and 7-inch height.

2. Allow the Engine to Cool: Ensure the engine and surrounding intake components have cooled before beginning installation.

3. Locate the Air Filter: Identify the aftermarket air filter installed on the vehicle's intake system.

4. Inspect the Primary Filter: Check the existing air filter for damage, excessive dirt buildup, or other conditions requiring maintenance.

5. Clean the Primary Filter if Necessary: Service the air filter according to its manufacturer's instructions before installing the Hydroshield.

6. Position the Hydroshield: Carefully slide the protective wrap over the existing air filter.

7. Ensure Proper Coverage: Verify that the Hydroshield covers the exposed filtration media without leaving large gaps.

8. Check the Fit: Confirm that the wrap fits securely without excessive stretching or bunching.

9. Inspect Surrounding Clearance: Make sure the Hydroshield does not contact moving components, hot exhaust surfaces, or sharp edges.

10. Verify Intake Security: Confirm that the primary air filter remains properly attached to the intake piping.

11. Inspect Periodically: Check the Hydroshield for accumulated debris, damage, or deterioration during routine maintenance.

12. Service as Necessary: Follow Injen's recommendations for cleaning or replacing the protective wrap.

Important: The Injen Hydroshield is designed to supplement the primary air filter, not replace it. Never operate the engine with only the Hydroshield installed.

What's Included

• (1) Injen Hydroshield Black Air Filter Pre-Filter (1118BLK)

Note: The primary engine air filter, intake piping, clamps, and other intake system components are not included.

Protect your performance intake system with the Injen Hydroshield Black Air Filter Pre-Filter (1118BLK). Featuring water-repellent construction, airflow-friendly synthetic material, and convenient slip-on installation, this protective wrap helps shield compatible aftermarket air filters from moisture, dust, dirt, and road debris.

Designed for closed-top air filters measuring approximately 7 inches at the base, 5 inches at the top, and 7 inches tall, the Injen Hydroshield is an excellent accessory for Honda and Acura performance builds, K-Series engine swaps, turbocharged applications, and other vehicles equipped with exposed aftermarket intake filters.

Whether you're protecting a cold air intake from unpredictable road conditions or helping maintain a cleaner performance air filter, Injen delivers a simple, effective solution for added intake system protection.