Swirl Flap Delete Kit for BMW 6 Cylinder M57N / M57N2 Engines

Protect your BMW diesel straight six from swirl flap failure

Eliminate a well-known weak point on BMW 3.0d straight-six diesels with this intake manifold blanking kit. By replacing the original swirl valves with precision blanking plugs, you remove the risk of fragments entering the engine and causing costly damage. This is the simple, permanent reliability upgrade trusted by enthusiasts and specialists.

We run this setup on our own cars and customer builds, and it has proven to be a fit-and-forget solution. Owners consistently report peace of mind, cleaner airflow and a smoother, more consistent drive.

Why choose this intake blanking solution

• Stops swirl flap failure before it happens, protecting your engine
• Removes a known restriction in the intake path for cleaner, more reliable airflow
• Direct fit for later BMW 3.0d variants using M57N and M57N2 engines
• Includes all required seals and gaskets for a proper, leak-free installation
• Ideal preventative maintenance on daily drivers, tuned cars and high-mileage vehicles

What’s included

• 6 x Swirl flap covers – 32 mm
• 6 x Inlet manifold seals
• 6 x Cylinder head side seals
• 1 x Inlet to EGR valve seal

Fitment

For BMW models using M57N and M57N2 diesel engines, including LCI where applicable:

• E53 X5 3.0d
• E60 E60N 5 Series 530d 535d
• E61 E61N 5 Series Touring 530d 535d
• E63N E64N 6 Series 635d
• E70 X5 3.0d 35d
• E71 X6 35d
• E83 E83N X3 3.0d
• E90 E90N 3 Series 325d 330d 335d
• E91 E91N 3 Series Touring 325d 330d 335d
• E92 3 Series Coupe 330d 335d
• E93 3 Series Convertible 330d 335d

Sizing guide

This kit is for 32 mm ports. If you are unsure which size your manifold uses, please measure your existing swirl valves using the product images as a reference before ordering.

Installation and support

Professional fitting is recommended. For installation in the UK, we can take care of everything at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability.

Common search terms

BMW 3.0d swirl flap blanks 32 mm, intake manifold blanking kit, runner flap delete, butterfly valve removal kit, manifold port bungs, M57 intake plugs, M57N M57N2 intake blanks, 530d 535d 330d 335d 635d swirl delete, E60 E61 E90 E91 E92 E93 E70 E71 E83 E53 E63 E64 diesel reliability upgrade.