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Express Car Parts

K&N E-3770 High-Performance Custom Round Air Filter

K&N E-3770 High-Performance Custom Round Air Filter

K&N E-3770

£95.50 GBP
£95.50 GBP
Sale Sold out
Shipping calculated at checkout.

Out of stock

Delivery & Returns

Changes and Returns

When you purchase online, you have a statutory right to return a Product for up to 14 days after your order has been delivered (cooling off period). However, we can change or cancel an order right up until it is dispatched. If the order has been dispatched, you can return the Product to us and we will organise a refund. Any products returned including the documentation and original packaging must all be in a re-saleable condition.

Faulty Goods

if goods are found to be faulty we should be notified to discuss a return. After you have returned faulty items they will be inspected before a refund is applied, If the item is not deemed faulty upon inspection you will be charged return carriage at cost. 

Claims

If a product is damaged please contact us and we will organise a replacement or refund. If damaged in transport, any claim may not be entertained by the courier once the delivery has been accepted. Any package with visible damage must be noted to the courier who should advise what should be done to protect you in the event this has caused product damage.

Delivery Charges

We offer simple and straight forward charges for delivery. A flat charge of £5.95 for goods with a total value of under £50.00 and free shipping for a total orders over £50.00. If for some unlikely reason we are unable to deliver to your location you would be informed and an immediate refund applied.

Couries We Use

We use a intermediary parcel company which gives us multiple quotes from the leading courier companies so we can provide the best delivery experience to our customers. 

We usually use the following couriers: 

Parcel Force

UPS

DHL

Evri

DX

K&N E-3770 High-Performance Custom Round Air Filter
Unlock your engine’s true potential with the K&N E-3770 Custom Air Filter. Engineered for drivers who refuse to compromise on power or protection, this premium drop-in replacement filter is designed to breathe new life into your vehicle's induction system. By swapping out your restrictive, disposable factory paper filter for K&N’s state-of-the-art oiled cotton media, you’ll experience an instant upgrade in throttle response, acceleration, and overall horsepower.
Why Choose the K&N E-3770?
  • Unmatched Breathability: Delivers up to 50% more airflow than standard, traditional paper filters. More air means more power, helping your engine run more efficiently and aggressively.
  • Superior Engine Protection: Features layered, pre-oiled cotton gauze reinforced with a heavy-duty inner wire mesh screen. This advanced infrastructure captures up to 99% of harmful dust, dirt, and debris, guarding your engine's vitals under demanding conditions.
  • Seamless Drop-In Fit: Designed as a precise, zero-modification custom replacement filter. It slots straight into your existing factory airbox or custom assembly with zero hassle.
  • The Last Air Filter You'll Ever Buy: This isn’t a disposable accessory—it is an investment. Fully washable and reusable, this filter is built to last the entire lifespan of your vehicle, significantly reducing landfill waste while saving you money on routine maintenance over time.
  • Technical Product Specifications
    Keep your build precise. Check the exact measurements below to confirm a perfect fit for your setup:
    • Filter Shape: Round
    • Outside Diameter (OD): 14 inches (356 mm)
    • Inside Diameter (ID): 12 inches (305 mm)
    • Height (H): 6 inches (152 mm)
    • Filter Material: High-Flow Layered Cotton Gauze
    • Structure: Wire Mesh Reinforced
    • Flanges: None (Zero-Degree Base Flange Angle)
    • Filter Re-Oiling Amount: 3.5 oz (103 ml)
  • Upgrade Your Ride Today
    Don’t let a choked-up paper filter limit your driving experience. Give your engine the high-velocity airflow it craves with the industry-leading filtration technology trusted by professional racers and daily drivers worldwide.
    Add the K&N E-3770 to your cart today and feel the difference the next time you step on the gas!
  • FREE DELIVERY Standard Items over £45 + VAT
  • EASY RETURNS Based in the UK, & Shipped from the UK
  • FLEXIBLE PAYMENT Options PayPal and Credit Cards

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