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Agency Power BMW B58 Ram Air Intake (M140i, M240i, 340i & 440i) - ML Performance UK

Agency Power BMW B58 Ram Air Intake (M140i, M240i, 340i & 440i)

Agency Power

  • £314.10
    exc. VAT £261.75
  • 9 reviews

Compatibility Check - Enter your full VIN. We will double check compatibility for you before dispatching!


One of the easiest ways to gain horsepower and improve your throttle response on the BMW M140i & M240i B58, turbocharged engine, is with an air intake kit. Agency Power’s new short ram air intake kit for the M140i & M240i is a great first modification to do. The intake kit is a complete replacement for the OEM air box. The kit includes a new aluminium intake tube with CNC machined MAP sensor mount, precision cut heat shield with mounting tabs, and a new high flow air filter.

The MAP sensor mount has been CNC machined out of 6061 aluminium to retain the factory fitment for proper readings. It is then TIG welded to the aluminium intake tube for proper placement. The main part of the intake is the high flow air filter. It features an inlet on the end cap to allow for an even larger volume of air to come through than a standard cone filter. The design improves air filtration while increasing air flow. The air filter is finished off with the Agency Power text and AP logo on the rubber end cap.

The heat shield is water jetted from aluminium with rubber trim to provide a secure fit and seal when the hood closes. It is designed to prevent direct hot air from the engine being sucked into the filter. Each heat shield features the AP logo neatly cut out from the shield panel for added style. All parts are finished in a matte black powder coat for an OEM look while the cylindrical air filter features a blue element matching to the BMW Roundel logo.

With the new air filter, your turbocharger can breathe better than the factory intake allows. This is noticeable as you step on the accelerator and hear the turbo work (sucking air noise). Release the throttle and the factory blow off valve noise (whoosh) is more audible and keeps you entertained through the gears!


Installation Tips

1. remove air box cover and filter.

2. loosen hose clamps to air box.

3. Remove air box (held in place with tabs and rubber grommets so pull gently)

4 install new heat shield, and tighten on with clamps

5. connect the new hard pipe to the intake system and set pipe up accordingly.

6. Tighten everything down before installing the air filter.


Compatibility Check

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout. 



BMW 1 Series
• 2016+ F20/F21 B58 M140i

BMW 2 Series
• 2016+ F22 F23 B58 M240i

BMW 3 Series
• 2016+ F30/F31 B58 340i*

BMW 4 Series
• 2016+ F32/F33 B58 440i*


*The intake system was designed on the BMW M240i chassis and the heatshield may require modifications to work on the 340i and 440i.


Manufactured by

Agency Power


Part Number





34cm x 34cm x 34cm




Next Day UK Delivery

Get FREE Guaranteed next day UK delivery for orders over £100 (exc. VAT) on all in stock items. Same day dispatch available if your order is placed before 11:00 GMT on all in stock items!

Worldwide Shipping

We ship worldwide via DHL International, simply enter your full address at checkout to see the shipping option(s) and quote(s). Same day dispatch available if your order is placed before 11:00 GMT on all in stock items!

Customer Reviews
5.0 Based on 9 Reviews
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Filter Reviews:
United Kingdom United Kingdom
Agency Power

Looks really good and makes a great noise

Andrew M.
United Kingdom United Kingdom
Agency Power B58 Intake

absolute class purchase. Product is really good, has a quality feel to it and it sounds amazing. Had a really good service from ML performance they kept me updated throughout and I would not hesitiate to order from them again.

A ML Performance Customer
Stuart S.
United Kingdom United Kingdom
This mod has made a big difference

Cracking product. Other than the sound and throttle response this has actually fixed a nagging issue I’ve had...I run a JB4 on my M140i (auto) and when at WOT there was hesitation between some gear shifts / loss of power. Since fitting this intake I no longer have that problem so for me this first hand highlights how restrictive the factory air box and intake pipe is - I think the factory intake pipe may have been collapsing under load...I’ve noticed it is very flexible when hot. Another thing I’d like to clear up as it was nagging me when trying to choose an intake...after monitoring my IAT’s / logs I can confirm heat soak isn’t a thing for me. I do have a CSF heat exchanger but these only really come into action when hooning it for long periods like when on track. Obviously when in traffic IAT’s rise but this is no different with the standard air box. Something I did after fitting the heat guard was applying silicone sealant around the inner edge of the the guard where it meets the arch as it doesn’t fit flush (on the M140i) this was to help prevent heat getting through that gap. Very pleased with the intake - highlight recommended.

George M.
United Kingdom United Kingdom
Perfect First Mod, Brilliant sound

This is my first mod for my M140i, Easily fitted and sound amazing. Definitely recommend this to anyone.

Jay c.
AP intake OMG!

My 2nd mod on the M140i along with jb+, great combo. This filter sounds amazing! Great turbo noise and that BOV wow! It’s just addictive! Also improved throttle response, A must have mod.