K&N High-Flow Air Filters BMW M5 & M8 (F90/F91/F92/F93 – S63 4.4L V8)

K&N High-Flow Panel Air Filters for BMW M5 & M8 (F90/F91/F92/F93 – S63 4.4L V8)

Part No: 33-3128  Quantity Required: 1 set (2 filters included per box)

Your F90 M5 or F9x M8 is a serious piece of engineering. The S63 4.4-litre twin-turbo V8 delivers supercar performance in a saloon, coupé or Gran Coupé body – huge torque, effortless speed and massive tuning potential. But even this engine is still forced to breathe through restrictive, disposable paper filters that were designed around cost and emissions targets, not enthusiasts.

It’s time to let that V8 breathe properly. The K&N High-Flow Panel Air Filters are the ideal “first mod” for any F90 M5 or F91/F92/F93 M8. Supplied as a pair to suit the twin airboxes, they are a direct, drop-in replacement for the original paper elements, transforming the way your engine inhales while being engineered to be the last air filters you’ll ever need to buy for the car.

Using K&N’s multi-layered, oiled cotton gauze construction, these filters offer significantly more airflow than the stock paper elements while still providing excellent filtration. In the real world that means sharper throttle response, stronger mid-range punch and a more purposeful induction sound every time you lean on the throttle.

Unlike the standard filters, these K&N elements are fully washable and reusable. When they become dirty, you simply clean them with the appropriate K&N service kit, re-oil and refit – no more throwing money away on disposable filters at every service.

Key Features & Benefits

• Built for the S63 V8: Designed specifically to support the airflow demands of the high-output 4.4L twin-turbo S63 engine in the F90 M5 and F9x M8.

• Increased Airflow: High-flow cotton gauze media allows the engine and turbos to draw in air more efficiently than the restrictive factory paper filters, helping to support gains in horsepower and torque.

• Sharper Throttle Response: Crisper, more immediate response when you get on the power, especially noticeable in the mid-range where these cars spend most of their time.

• Reusable for Life: Fully washable and reusable – clean, re-oil and refit instead of replacing, saving you money over the lifetime of the vehicle.

• Direct Drop-In Replacement: Designed to fit perfectly into the OEM twin airboxes with no cutting, drilling or extra hardware required.

• Excellent Engine Protection: Multi-layer oiled cotton gauze provides outstanding filtration, helping to keep dust and debris out of your S63 while still flowing far more air than paper.

• Ideal for Tuned Cars: Perfect supporting mod for Stage 1 and Stage 2 ECU remaps, downpipes and exhaust upgrades – removes a key restriction on the intake side.

MSL Recommends

All F90 M5 and F9x M8 models use twin intake airboxes, which means they require two panel filters per car. K&N 33-3128 is supplied as a matched pair, so you only need one kit per vehicle.

We highly recommend this upgrade as:

• A simple, cost-effective performance enhancement on a completely stock M5 or M8.

• A supporting modification for tuned cars, helping your S63 make the most of additional boost, fuelling and exhaust flow.

For long-term ownership, we also suggest keeping a K&N cleaning and re-oiling kit on hand so you can service the filters correctly and keep them performing at their best for years to come.

Full Vehicle Fitment List

This K&N High-Flow Panel Air Filter kit (33-3128) is suitable for the following BMW M models equipped with the S63 4.4-litre twin-turbo V8 and standard twin airboxes:

• BMW M5 – F90 Saloon

  • 4.4L S63 twin-turbo V8

  • 2018–onwards

  • Includes M5, M5 Competition and M5 CS variants

• BMW M8 – F91 / F92 / F93

  • 4.4L S63 twin-turbo V8

  • F91 M8 Convertible – 2020–onwards

  • F92 M8 Coupé – 2020–onwards

  • F93 M8 Gran Coupé – 2020–onwards

  • Includes standard and Competition models

If you’re unsure whether this is the correct filter kit for your car, just get in touch with your registration or VIN and we’ll be happy to confirm compatibility before you order.