BS4246
Blue Sky Filter
8421230000
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| Part Name | 76mm Cold Air Intake Bypass Valve Filter |
| BS Number | BS4246 |
| Size | OEM & ODM (Customized) |
| Color | Black(Can Be Customized) |
| Structure | Aluminum,Non-woven |
| Fits Model | * Universal Fitment - (2.75" Piping Only) |
| Special Properties | *High airflow with reliable filtration efficiency *Durable construction for long service life *Precision fit for easy installation and secure sealing *Suitable for automotive aftermarket replacement and performance upgrades *Factory-direct wholesale supply with OEM/ODM customization available |
| Supplier | Nanjing Blue Sky Filter |
| Customization | Size, Efficiency, Color, Packaging, Logo |
| *This is not a OEM product. The brand names and logos are the registered trademarks of their respective owners. Any use of the brand names or model designations For this product are made solely For purposes of demonstrating compatibility.All brand names and model numbers mentioned are for compatibility purposes only. We do not claim affiliation with or endorsement by the original brand owners. Products are manufactured by us and can be customized with your brand. | |







76mm Universal Fit: Designed for compatible 76mm / 3 inch cold air intake pipe systems and aftermarket intake setups.
Bypass Valve Function: Helps provide an extra airflow path when the main intake area faces water splash or airflow restriction.
High Flow Intake Support: Low-restriction filter structure supports smoother intake airflow for modified engine intake systems.
Helps Reduce Water Intake Risk: Designed to help lower the chance of water entering the intake system in wet road conditions.
Engine Intake Protection: Filter media helps block dust, debris and airborne particles before they enter the intake pipe.
Compact Intake Accessory: Lightweight and compact design makes it suitable for performance intake modification projects.
Easy Installation: Simple structure allows convenient installation on compatible intake pipe systems.
OEM & ODM Customization: Size, color, filter media, logo, label, packaging and bulk supply can be customized for auto parts buyers.
Cold air intake system upgrades
Performance vehicle modification projects
Automotive aftermarket intake components
Engine air intake protection systems
Q1: What is a cold air intake bypass valve filter used for?
A1: A cold air intake bypass valve filter is used in modified intake systems to provide an additional airflow path. It helps support airflow and may reduce the risk of water being drawn into the engine intake system.
Q2: What does 76mm mean for this intake bypass filter?
A2: 76mm refers to the connection diameter of the filter, which is approximately 3 inches. Buyers should measure the intake pipe diameter before ordering.
Q3: Is this 76mm bypass valve filter universal?
A3: It is universal for compatible 76mm / 3 inch intake pipe systems. However, it is not a guaranteed direct fit for every vehicle, so installation space and intake structure should be checked first.
Q4: How does an intake bypass valve help reduce water intake risk?
A4: When the main intake filter is exposed to water splash or temporary blockage, the bypass filter can provide another air path. This may help reduce the chance of water being pulled through the main intake route.
Q5: Is this product suitable for cold air intake systems?
A5: Yes. It is commonly used with cold air intake systems, especially setups where the intake filter sits lower in the engine bay or closer to possible water splash areas.
Q6: Does this bypass filter improve engine performance?
A6: This product mainly supports intake airflow and intake protection. Actual engine performance depends on the complete intake system, vehicle setup, installation quality and engine condition.
Q7: What materials can be customized for this bypass valve filter?
A7: Filter media, frame material, rubber connector, color and surface design can be customized according to buyer requirements and market positioning.
Q8: Can the color and logo be customized?
A8: Yes. Color, logo, label, package design and retail box can be customized for wholesale, OEM / ODM and private label orders.
Q9: Who usually buys this type of intake filter?
A9: Typical buyers include auto parts distributors, performance parts brands, tuning shops, repair stores, e-commerce sellers and cold air intake kit suppliers.
Q10: Is this an original vehicle manufacturer part?
A10: No. This is an aftermarket intake accessory made for compatible intake systems. Vehicle names, model names or part numbers are used only for compatibility reference when needed.



Nanjing Blue Sky Filter Co., Ltd. was founded in 2009. Blue Sky manufactures and sells various types of air filters and has expanded the product range to water filtration products, kitchen filtration products, and automotive filtration products etc. The company's products are exported to international markets of 48 countries.
Since its establishment, Nanjing Blue Sky Filter Co., Ltd. has steadily grown and has obtained ISO9001 and ISO14001 certifications. Blue Sky has been recognized as a National High-Tech Enterprise and hold multiple 8patents and quality inspection reports. Blue Sky boasts a modern standardized workshop, advanced production equipment, well-designed production lines, strict quality control, and a management system to ensure that customers receive the best cooperation and service. All true high-efficiency filters are produced in a standardized dust-free workshop. We also have a comprehensive and advanced testing laboratory to ensure the high-quality performance of HEPA filters.
Blue Sky’s filtration products are produced with various environmentally friendly materials and advanced production facilities to meet customized specifications and some special requirements. Blue Sky’s filtration products strictly adhere to domestic and international standards, such as EN779 and EN1822 etc.
Blue Sky’s technical team excels in developing various new filtration products for many appliances and machines, residential, commercial, and industrial applications.
Blue Sky has a well-trained, highly qualified team of engineers and a sales team dedicated to market and customer service. We provide integrated services to customers worldwide, not only offering mature filtration products but also designing and developing new filtration products for our customers. We are confident that with our production capabilities and experience, we can help customers gain a competitive advantage.
Blue Sky‘s motto is to be a eco-friendly and sustainable company, providing customers with competitive high-quality filter products, and growing together!
1、Integrated Manufacturing and Logistics: Offers comprehensive services from production to shipment.
2、Extensive Product Line: Covers air, water, kitchen, and automotive filtration products.
3、International Quality Certifications: Holds ISO9001, ISO14001 certifications, and multiple patents.
4、Customized Services: Provides customized solutions for special specifications and requirements.
5、Global Service: Products are exported to more than 45 countries and areas, with rich international service experience.
6、Advanced Production Facilities: Standardized dust-free workshops and strict quality control.
7、Continuous Innovation: Constantly developing new products to maintain technological leadership.
8、Professional Team: Well-trained engineers and sales team offering support.
9、Eco-friendly and Sustainable: Committed to using environmentally friendly materials and sustainable development.
10、High Customer Loyalty: Quality products and services earn customer trust.


Yes, We are a professional manufacturer that welcomes customization, including raw material selection, specific logo printing, and packaging. Additionally, we can produce items according to your samples or drawings.
Vacuum Cleaner Filters, Air Purifier Filters, HVAC Filters, Automobile Filters, Industrial Filters, Humidifier Filters, Cooker Hood Filters, Medical Filters and other filters etc.
You can have the following services from our team: Customized Product Solutions (Including the certain designs), Quality Assurance, New product's R&D, Global Logistics per request, After-Sales Support etc.
You can pay in various ways, such as T/T , L/C, D/P, Credit Card, Paypal, Payoneer and etc.
The production time depends on the order quantity and product type . Usually, it takes about 30 days to fulfill a 20' container order.
The shipment to deliver the goods can be arranged by our team according to the customer's request, and the customer can also let his own logisitics agency to do the work.
Our company is truly responsible for the supplied products throughout its warranty period.
Our team of skilled engineers and technical experts is available around the clock to assist you with any questions or issues that may arise, ensuring your complete satisfaction with our products and services.
Our team has been working in the filtering industry for 16 years, and focuses on the following principles to keep the long-term and good relation with the customers:
Mutual Respect and Trust, Consistent Quality and Reliability, Open and Transparent Communication,
Adaptability and Flexibility, Continuous Improvement, Attentive After-Sales Support and Service.
