K&N High-Flow Washable Reusable Panel Air Filter – BMW 6 Series E63/E64 645Ci 4.4 V8 (2004-2005) – OEM Drop-In Performance Replacement

K&N High-Flow Washable Reusable Panel Air Filter – BMW 6 Series E63/E64 645Ci 4.4 V8 (2004-2005) – OEM Drop-In Performance Replacement

£76.50
£76.50
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

K&N Performance Air Filter for BMW 6 Series E63 E64 645Ci 2004 to 2005

Unlock quick, reliable performance gains with the K&N performance panel air filter for the BMW 6 Series E63 and E64 645Ci 2004 to 2005. This direct replacement, high flow, washable and reusable cotton gauze air filter drops straight into the factory air box, improving airflow for sharper throttle response, stronger acceleration and a sportier induction note, all while delivering exceptional filtration.

We run K&N filters on our own cars and our customers consistently rate them as one of the best value performance upgrades for the BMW 645Ci. No tuning required, no modifications, just a simple drop-in that helps your V8 breathe better.

Confirmed fitment

  • BMW 6 Series E63 Coupe 645Ci 2004 to 2005
  • BMW 6 Series E64 Convertible 645Ci 2004 to 2005
  • Direct replacement for the OEM paper panel filter in the original air box

Why choose a K&N high flow air filter

  • Designed to boost horsepower and rate of acceleration
  • High airflow with excellent filtration to protect your engine
  • Washable and reusable performance air filter for long term savings
  • Up to 50,000 miles between services depending on driving conditions
  • Works seamlessly with OEM electronics and sensors
  • Will not void your vehicle warranty
  • Backed by K&N’s famous Million Mile Limited Warranty

Easy installation and maintenance

This is a genuine drop-in upgrade. Remove your disposable paper filter and fit the K&N panel filter into the standard BMW air box. No cutting or coding required. When it is time to service, simply clean and re-oil with a K&N service kit and refit.

Why buy from Nforcd

Nforcd are BMW performance specialists. We trust K&N filters for their consistent quality, durability and proven gains in throttle response. Prefer professional fitting or a full inspection while you upgrade. We offer installation at our Warwickshire workshop. Request a fitting quote at Sales@nforcd.com.

What you get

  • 1 x K&N high flow replacement panel air filter for BMW 6 Series E63 E64 645Ci 2004 to 2005

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