Collection: MMX Performance Parts
MMX Performance Parts – Precision Engineered BMW Upgrades
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MMX Performance Parts – Precision Engineered BMW Upgrades
Welcome to the MMX collection at String Theory Garage — your destination for high-quality MMX performance parts engineered to elevate BMW performance, handling, and style. MMX is a UK-designed automotive performance brand known for its precision-engineered modifications and aftermarket upgrades tailored specifically for BMWs of all generations.
Why Choose MMX for Your Performance Build
MMX Performance (formerly MMR Performance) specialises in crafting premium tuning parts and upgrades that bring real-world performance gains and enhanced drivability to enthusiast cars. Every product is developed with passion and expertise, bringing British engineering excellence to life with attention to detail, durability, and usability.
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Designed for BMW Cars: From precision wheel spacers and lowering springs to performance intake components, crank hubs, and heat shielding kits, MMX offers a full suite of upgrades made specifically for the unique demands of BMW and MINI platforms.
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UK-Engineered Quality: All MMX products are designed, prototyped, and tested in the United Kingdom — using advanced 3D scanning, CAD technologies and rigorous real-world testing to ensure fitment, performance and reliability you can trust.
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Performance, Style & Durability: Whether you’re tuning for increased handling precision, improved power delivery, or enhanced aesthetic appeal, MMX parts deliver performance that’s built to last.
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Comprehensive Product Range: The MMX catalogue spans performance air intake upgrades, lightweight wheel spacers, handling suspension mods, drivetrain enhancements, billet accessories and more — giving you the freedom to tailor upgrades to your specific BMW.
Explore Our MMX Range
At String Theory Garage, our MMX collection brings you a curated selection of these premium performance upgrades ideal for BMW M-series, 1/2/3/4/5 Series, MINI Cooper and JCW models. Whether building a track weapon, tuning a daily driver or enhancing your car’s presence and feel on the road, MMX parts deliver precision, performance and passion in every component.
Browse below to find the perfect MMX performance upgrades for your vehicle — and bring out the full potential of your BMW or MINI.
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MMX Oil Change Service Kit Bundle for BMW B58 & B57
Regular price £178.00 GBPRegular priceSale price £178.00 GBP -
MMX Power Control Module Tuning Box Tuning Box - BMW G87 M2
Regular price £749.99 GBPRegular priceSale price £749.99 GBP -
MMX Billet Gear Shift Paddle Set – BMW E90 E92 E93 M3
Regular price £182.00 GBPRegular priceSale price £182.00 GBP -
MMX Gear shift paddles | G Series | Titanium Magnetic Paddle Inc Fitting kit
Regular price £269.99 GBPRegular priceSale price £269.99 GBP -
MMX Chargepipe kit for BMW F8x S55 M2 Comp M3 M4
Regular price £458.63 GBPRegular priceSale price £458.63 GBP -
MMR 4-pinned single piece crank hub for BMW N55 & S55
Regular price From £682.49 GBPRegular priceSale price From £682.49 GBP -
MMX Power Control Module Tuning Box - BMW F87 M2
Regular price £649.99 GBPRegular priceSale price £649.99 GBP -
MMX Power Control Module Tuning Box - BMW F80 M3
Regular price £649.99 GBPRegular priceSale price £649.99 GBP -
MMX Power Control Module Tuning Box BMW F82 & F83 M4 S55
Regular price £649.99 GBPRegular priceSale price £649.99 GBP -
MMR Cold Air Intake Kit Including Heat Shield - BMW F20 F21 M140I B58
Regular price £600.59 GBPRegular priceSale price £600.59 GBP -
MMX DCT Transmission Oil Cooler BMW E90 E92 E93 M3
Regular price £546.00 GBPRegular priceSale price £546.00 GBP -
MMX Performance Intercooler - BMW E82 E88 E90 E91 E92 & E93 N54
Regular price £491.39 GBPRegular priceSale price £491.39 GBP -
MMX Single Piece Crank Hub - BMW F20 F21 F80 F82 F87 N55 & S55
Regular price From £468.47 GBPRegular priceSale price From £468.47 GBP -
MMX High Flow Aluminium Chargepipe kit - BMW M2 | M3 | M4 (S55) (F80 F82 F83 F87)
Regular price £458.63 GBPRegular priceSale price £458.63 GBP -
MMX Intake Pipe Set - BMW M2 M3 & M4 (G80, G81, G82, G83 & G87)
Regular price £399.99 GBPRegular priceSale price £399.99 GBP -
MMR Performance Oil Catch Can Kit - BMW M135i (F20/F21) | M235i (F22) | M2 (F87) (N55)
Regular price £366.90 GBPRegular priceSale price £366.90 GBP -
MMR Baffled Oil Sump Pan - BMW N55 Engine (M135i | M235i | M335i | M435i)
Regular price £359.27 GBPRegular priceSale price £359.27 GBP -
MMX 3-piece Complete Underbody Chassis Brace Set - MINI Cooper S | SD | JCW F56
Regular price £351.74 GBPRegular priceSale price £351.74 GBP -
MMR High-Flow Aluminium Charge Pipe Intake Side - BMW N55
Regular price £289.37 GBPRegular priceSale price £289.37 GBP -
MMR High-Flow Aluminium Charge Pipe kit - BMW M140i M240i 340i 440i B58
Regular price £289.37 GBPRegular priceSale price £289.37 GBP -
MMR High-Flow Aluminium Charge Pipe Kit - BMW M5 (F10) | M6 (F12|F13) (S63)
Regular price £289.37 GBPRegular priceSale price £289.37 GBP -
MMR Short Gear Shifter - MINI Cooper S | DS | JCW (F54 F55 F56)
Regular price £283.91 GBPRegular priceSale price £283.91 GBP -
MMX Gear shift paddles | F Series | Titanium Magnetic Paddle Inc Fitting kit
Regular price £269.99 GBPRegular priceSale price £269.99 GBP -
MMX Chargepipe Kit for BMW (N54) (E82 E88 E90 E91 E92 E93) 135i 335i & 1M Coupe
Regular price £199.49 GBPRegular priceSale price £199.49 GBP






















