Maxton Design Street Pro Rear Side Splitters V2 with Flaps for BMW M135i (F70)
Add a sharper, track-inspired finish to the rear of your BMW M135i with these Street Pro V2 rear side splitters and flaps. They extend the rear bumper line for a lower, wider look and can help smooth airflow at the back of the car.
Fitment
Designed for BMW M135i F70 2024-on. Fits only when used with part code BM-1-70-M-RS1GOO_OO. For full details, use our vehicle lookup or see the Vehicle Fitment tab.
Why choose these splitters
– Subtle aero-inspired styling with removable flaps for a more aggressive edge.
– Tough 10 mm ABS construction for daily use.
– Direct, secure mounting using the supplied hardware.
Materials and finish
Made from 10 mm ABS plastic with a UV-protective coating. Highly resistant to impacts, scratches, and weather. Supplied in matte black. Also available with a red core accent. No painting required. If painting, apply primer first.
Quality and safety
TUV MATERIALGUTACHTEN certified for material quality. Each part is authenticity-labelled. Arrives protected with a vacuum-sealed film to prevent marks during transport and handling.
Whats in the box
– Maxton rear side splitters V2 with flaps
– Mounting kit
Installation
Bolt-on fit with basic tools. Check alignment before drilling. We recommend careful test-fitment to ensure clearance with your existing rear components.
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.







