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K&N

K&N 33-2573 High-Flow Performance Washable & Reusable Replacement Panel Air Filter - Drop-In OEM Upgrade for Audi S6 C4, Audi V8 Quattro, BMW E34 530i/535i, BMW E32 730i/735i

K&N 33-2573 High-Flow Performance Washable & Reusable Replacement Panel Air Filter - Drop-In OEM Upgrade for Audi S6 C4, Audi V8 Quattro, BMW E34 530i/535i, BMW E32 730i/735i

£63.99
£79.99 £63.99
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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 33-2573 Performance Panel Filter

Give your classic Audi or BMW a simple breathing upgrade with the K&N 33-2573. This serviceable cotton gauze panel insert drops straight into the factory air box for a cleaner, sharper intake response and long-term savings. Compared to a throwaway paper element, the 33-2573 offers excellent airflow with reliable engine protection, helping your V8 or straight six feel more eager across the rev range while keeping maintenance easy.

We run these filters on our own builds at MJ Modifications and customer feedback has been superb for fit, finish and value. If you are looking for a sports air filter insert for an Audi S6 C4, Audi V8 Quattro or BMW E34 and E32 models, this is the correct panel element.

Why enthusiasts choose this filter

  • Direct-fit panel element for the OE air box
  • High-flow cotton media designed for improved intake efficiency
  • Washable and reusable for a lifetime of use
  • Straightforward servicing and quick installation
  • Cost-effective alternative to disposable paper filters

Confirmed fitment

Please double check compatibility before ordering. If you need help, contact us and we will verify it for you.

Audi

  • S6
    • S6 C4 Saloon (4A2): S6 4.2 Quattro 213 kW / 290 HP 06/1994 to 10/1997
    • S6 C4 Avant (4A5): S6 4.2 Quattro 213 kW / 290 HP 06/1994 to 12/1997
  • V8
    • V8 441, 442, 4C2, 4C8: 3.6 Quattro 180 kW / 245 HP 04/1993 to 02/1994
    • V8 441, 442, 4C2, 4C8: 3.6 Quattro 184 kW / 250 HP 10/1988 to 02/1994
    • V8 441, 442, 4C2, 4C8: 4.2 Quattro 206 kW / 280 HP 10/1991 to 02/1994

BMW

  • 5 Series
    • E34 530i 3.0 138 kW / 188 HP 1988 to 1991
    • E34 535i 3.5 155 kW / 211 HP 1988 to 1995
  • 7 Series
    • E32 730i 3.0 138 kW / 188 HP 1986 to 1994
    • E32 730i 3.0 145 kW / 197 HP 1986 to 1994
    • E32 735i 3.5 155 kW / 211 HP 1986 to 1992
    • E32 735i 3.5 162 kW / 220 HP 1986 to 1987

Fitment verification before shipping

For peace of mind, we confirm compatibility prior to dispatch. Add your UK registration or the last 7 digits of your VIN at checkout and our team will validate the part against your vehicle.

Fitting service

Prefer professional installation by enthusiasts who know these platforms inside out? Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Part number

33-2573

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