Pay in installments of $10.91 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
For Your Every Summer RSVP, with Code: SUMMER15
Description
Wehrli Custom Fab WCF100728 Outerwears Pre-Filter Air Filter CoverExtend the life of your air filter with the Wehrli Custom Fab WCF100728 Outerwears Pre Filter Air Filter Cover from GAP. Wehrli Custom Fabrication highly recommends using an outerwears air filter coveror pre filter for all WCFab air filters in their turbo kits and intake kits. These pre filters are specifically designed to deflect damaging debris, which can clog air filters and compromise peak air flow and horsepower. In addition, by using a pre
Extend the life of your air filter with the Wehrli Custom Fab WCF100728 Outerwears Pre-Filter Air Filter Cover from GAP. Wehrli Custom Fabrication highly recommends using an outerwears air filter coveror pre-filter for all WCFab air filters in their turbo kits and intake kits. These pre-filters are specifically designed to deflect damaging debris, which can clog air filters and compromise peak air-flow and horsepower. In addition, by using a pre-filter, you can extend the time between servicing intervals for your primary air filter media, reducing costs and increasing convenience.
WCFAB pre-filters feature uniform micron openings and are run dry. No additional oils or additives are necessary. This dry method prevents dirt from sticking to the oil, which can result in reduced airflow and horsepower. Only particles smaller than .005" can pass through the pre-filter, while larger particles simply fall off. Additionally, these filter covers are constructed with a specially treated woven mesh that repels water without causing any airflow loss. Whether you use your vehicle for everyday driving or hard-core off-road racing, pre-filters are a reliable option to protect and prolong the life of your performance air filter and engine.
WCFab filter covers are treated with a hydrophobic process that helps repel moisture and safeguards against water entering the engine due to puddle splash or heavy rainstorms. However, it's important to note that while their pre-filters are highly effective in repelling water, they are not waterproof. If your intake is submerged, it can hold or pass water. The hydrophobic treatment lasts for six months to one year, depending on usage and conditions. To determine if it's time to replace your pre-filter, you can perform a quick test by spraying water on it with a clean spray bottle. If the water beads off, the water repellency is still intact. If water enters through the pre-filter, it's time to purchase a new cover.
Note:
Maintenance and cleaning of the pre-filter depend on driving conditions and may vary. WCFAB recommend visually inspecting the pre-filter as often as you would normally service your vehicle. For vehicles that are exposed to dirt track competition or dirt road driving, they advise checking the pre-filter after every race or trip. if you notice a significant amount of dirt, it's time to clean the pre-filter. If you primarily drive on the street, they suggest checking the pre-filter every 3,000-5,000 miles. While a thorough cleaning may not be necessary, shaking off any excess dirt is recommended to maintain optimum horsepower and fuel efficiency. Caked debris can be loosened by soaking the filter cover in a mild soapy water solution, then rinsing clean and allowing it to dry before reinstallation. Avoid scrubbing or using aggressive cleaning chemicals, as they can damage the pre-filter and its hydrophobic treatment, resulting in reduced efficiency and premature failure.
WCFAB pre-filters feature uniform micron openings and are run dry. No additional oils or additives are necessary. This dry method prevents dirt from sticking to the oil, which can result in reduced airflow and horsepower. Only particles smaller than .005" can pass through the pre-filter, while larger particles simply fall off. Additionally, these filter covers are constructed with a specially treated woven mesh that repels water without causing any airflow loss. Whether you use your vehicle for everyday driving or hard-core off-road racing, pre-filters are a reliable option to protect and prolong the life of your performance air filter and engine.
WCFab filter covers are treated with a hydrophobic process that helps repel moisture and safeguards against water entering the engine due to puddle splash or heavy rainstorms. However, it's important to note that while their pre-filters are highly effective in repelling water, they are not waterproof. If your intake is submerged, it can hold or pass water. The hydrophobic treatment lasts for six months to one year, depending on usage and conditions. To determine if it's time to replace your pre-filter, you can perform a quick test by spraying water on it with a clean spray bottle. If the water beads off, the water repellency is still intact. If water enters through the pre-filter, it's time to purchase a new cover.
Features:
- UV Resistant
- Air Filter Cover
- Puncture Resistant
- Filters Debris Down To .005"
- Hydrophobic Water-Repellent Treatment
- Resistant To Heat Up To 450 Degrees F
- Enhances The Efficiency Of Performance/Exposed Air Filters
- Compatible with WCF100717 4" Air Filter and WCF100719 5" Air Filters
Note:
Maintenance and cleaning of the pre-filter depend on driving conditions and may vary. WCFAB recommend visually inspecting the pre-filter as often as you would normally service your vehicle. For vehicles that are exposed to dirt track competition or dirt road driving, they advise checking the pre-filter after every race or trip. if you notice a significant amount of dirt, it's time to clean the pre-filter. If you primarily drive on the street, they suggest checking the pre-filter every 3,000-5,000 miles. While a thorough cleaning may not be necessary, shaking off any excess dirt is recommended to maintain optimum horsepower and fuel efficiency. Caked debris can be loosened by soaking the filter cover in a mild soapy water solution, then rinsing clean and allowing it to dry before reinstallation. Avoid scrubbing or using aggressive cleaning chemicals, as they can damage the pre-filter and its hydrophobic treatment, resulting in reduced efficiency and premature failure.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 30 reviews
Sort
Product Reviews
★★★★★ 5
Great running hat.
Size: One Size, Color: (001) Black / Black / Reflective
I absolutely love this hat, it is so cute and great for warm weather. I especially love to run with it, you can tighten it easily so it does not blow off if it is windy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 17, 2025
★★★★★ 4
Thin and flimsy
Size: One Size, Color: (001) Black / Black / Reflective
Very flimsy hat
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
★★★★★ 5
Worth the prize
Size: One Size, Color: (001) Black / Black / Reflective
Light and breathable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
★★★★★ 5
Perfect for running, I love this hat.
Size: One Size, Color: (025) Castlerock / Castlerock / Reflective
This hat is perfect for running in, it's very light weight and breathable so it doesn't get annoying or hot when you're running in the sun. It's easy to clean, just a quick hand wash in the sink and it's dry in 30 minutes. I have a very big head and it's fits me great. If you have a very small head it might be a bit big.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2025
★★★★★ 5
Perfect hat to buy
Size: One Size, Color: (001) Black / Black / Reflective
Perfect fit. Will buy again.
Easily washable. Color doesn’t fade after washing. Perfect for sun protection.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 5, 2025
recommand products
Catalytic Converter for California Grade CARB Compliant Universal Catalytic Converter MagnaFlow 338104
159.50
Shredded papers - craft work - EKC2022
85.00
Exhaust Tail Pipe Tip for 3in. Round Polished Exhaust Tip MagnaFlow 35229
166.00
Catalytic Converter for 1986-1989 Nissan D21 2.4L MagnaFlow 23617
118.00
Santas Little Helpers - BKLT41694
168.75