Maxton Design
Maxton Full Body Kit Set 1 for BMW M340i (G20/G21) adds a sharper, lower look while improving airflow stability. Finished in gloss black to match modern BMW styling.
Designed specifically for the BMW M340i G20 Sedan and G21 Touring, model years 2018-2022. Please use our vehicle lookup or check the Vehicle Fitment tab to confirm compatibility for your car.
Whats included
This complete kit pairs four styling components for a cohesive factory-like finish: a front splitter, side skirt diffusers, a rear valance, and rear side splitters. The rear valance fits cars without a towbar.
Why it matters
The front splitter and side diffusers help manage airflow along the body at speed. The rear valance and side splitters visually lower the rear and tidy up the bumper line. The result is a cleaner, sportier stance that complements the M340is design without looking overdone.
Material and finish
Made from ABS plastic, the same type of material used for many OEM bumpers. ABS is strong yet slightly flexible to resist cracking, and it handles daily weather and road use well. Supplied in gloss black for a premium, ready-to-fit look.
This product has TUV MATERIALGUTACHTEN certification for the material used.
Fitment notes
- BMW M340i G20 Sedan 2018-2022 and G21 Touring 2018-2022
- Rear valance fits cars without towbar
Important: Test fit all parts before drilling or final assembly. Professional installation recommended to ensure correct alignment and secure mounting.
Choosing a Kit
Our vehicle registration lookup system cannot detect factory trim level. It is important for customers to check the specification of their own vehicle against the product description, and if their vehicle has an existing sports trim level, body kit or factory enhancement that may cause it to look different from other similar models.
For example: Volkswagen R-Line, BMW M-Power/M-Pack, Audi S-Line, Ford ST-Line, Merc AMG-Line, Seat FR.
These kits will not fit models that don't meet these specifications.
Returns
Purchased the incorrect kit for your vehicle? Or not sure you like the surface finish when it arrives? No problem!
Maxton Design products are eligible for return if the product has not been fitted, drilled, modified or damaged in any other way and still has the protective factory film intact. Unfortunately, there are no exceptions, this applies to fully removed and partially removed films.
Products with a protective film in place are clearly marked with this sticker, if you believe there to be an issue with the product but you can't tell without removing the film, please contact our support team directly for assistance.

DO NOT REMOVE THE FACTORY FILM UNTIL YOU'VE LINED IT UP, AND YOU'RE READY TO FIT THE PART.
See our Terms & Conditions for more information.
Installation & Fitting
Instructions & Guides
Maxton Design provide either an online reference (below) or printed instructions with their products, we can't stress enough how important it is to follow these guidelines. Not only does this create a safe, aesthetically well fitted product, but it increases the longevity and lifespan of the kit.
Neither Progressive Parts nor Maxton Design will be able to provide and support or warranty for products fitted incorrectly. For example, front splitters require the front bumper to be removed, without doing so the bolts will be incorrectly positioned and may not be able to cope with the down-force exerted on it. Straying from the guidelines in this manner must be done so at the owners risk.
Fibreglass & "Non-Prepped" Products
By adding these products to your basket you are agreeing to the below statement.
All Maxton Design Fibreglass products including certain bumpers, spoilers, spoiler extensions and skirts will require “prep” before installing.
These are not a simple 'ready to fit' modification. In transit, the items may get chipped or marked and as such prior to painting it is important you understand that the parts may require filling, sanding and repairing (defined "prep") prior to paint being applied, which can be undertaken by any reputable body shop at minimal cost.
Return requests based on not anticipating the definition above are not accepted, please be aware you have agreed to this statement and the definition of “prep” work required prior to purchasing.
Product images shown for sale often indicate a finished product, the colour shown on the vehicle is for illustration purposes.
Fitting Manuals
Please note, Maxton Design products are only available for UK shipping.
Including Northern Ireland, Scottish Highlands and Channel Isles. Delivery fees apply.














