Skip to content

5 Star Google Reviews

Welcome to our store

Worldwide Shipping

Milltek Exhausts Now Available

Shop by Car
Shop by Brand
- String Theory Garage
  
  Products on our car
- AIRTEC
- Akrapovic
- AP Racing
- ARTEC
- AST Suspension
- Bilstein
- BMC
- Carbotech Brakes
- Cargraphic
- Cobra
- Coolerworx
- CSF
- CUSCO
- DGS BLX
- Eibach
- Evo Corse
- Ferodo
- Garage Whifbitz
- Hardrace
- HJS
- HKS
- ITG
- JCR
- Lamspeed
- Lifeline
- Milltek
- MMX
- MOTON Suspension
- MOTUL
- Nankang
- Nitron
- Pagid
- PWR Advanced Cooling Technology
- PWRD
- Rally Flapz
- RAYS
- Recaro
- Shortiez
- Tarox
- TOM'S
- TSW
- Turbosmart
- Verkline
- Wagner Tuning
- Wedssport
- Xtreme
Shop by Part
- Braking
  
  Discs
  Hoses
  Kits
  Pads
  Other
- Engine & ECU
  
  Cooling
  ECU Map | Tuning
  Gearbox & Clutch
  Turbo
  Other
- Exterior & Trim
  
  Splitters & Diffusers
  Spoilers
  Other
- Intake & Exhaust
  
  Exhaust
  Intake
  Valve Control
- Handling & Suspension
  
  Anti Roll Bars
  Bracing
  Bushes & Bearings
  Coilovers & Shock Absorbers
  Drop Links
  Lowering Springs
  Suspension Arms
  Top Mounts
- Seats & Interior
  
  Harnesses
  Roll Cage
  Seats
  Sound
  Other
- Wheels & Tyres
  
  Tyres
  Wheels
  Wheel Nuts & Studs
  Wheel Spacers
Specialist Services
Apparel
About
Contact
Blog
AST Suspension

Country/region

Search

France GBP £
Singapore GBP £
United Kingdom GBP £
United States GBP £

Facebook
Instagram
YouTube

Search

Shop by Car
Shop by Brand
Shop by Part
Specialist Services
Apparel
About
Contact
Blog
AST Suspension

Search

Item added to your cart

View cart

Collection: BMW

You are now browsing for BMW Parts & Upgrades

Here at String... Read More

You are now browsing for BMW Parts & Upgrades

Here at String Theory Garage we stock a large and ever expanding range of BMW Parts. A complete range of upgrades, all tested, developed and proven. From Suspension upgrades to ECU tuning we have you covered. Parts and Upgrades available for BMW M1 | M2 | M3 | M4 | M5 | M135i | M140i | M235i | M240i |1 Series | 2 Series | 3 Series | 4 Series | 5 Series & More

We also offer full fitting with ride-height, corner balancing, and geometry setup as well as other services from our garage in Stratford upon Avon.

Upgrade your BMW's agility with top-tier performance parts & expert geometry setup - unleash unparalleled handling and speed today at String Theory Garage.

Nearside rear view of a grey BMW M2 G87 with black alloy wheels & an Akrapovič Titanium twin pipe double round exhaust fitted

Sort by:

383 products

Filter:

Car Manufacturer (0) Match all

Car Manufacturer

Audi (7 products)
BMW (382 products)
Chevrolet (7 products)
Dodge (7 products)
Ferrari (7 products)
Ford (7 products)
Fiat (7 products)
Honda (7 products)
Hyundai (7 products)
Lamborghini (7 products)
Lotus (7 products)
Mazda (7 products)
Mercedes-Benz (7 products)
MINI (12 products)
Mitsubishi (7 products)
Nissan (7 products)
Peugeot (7 products)
Porsche (7 products)
Renault (7 products)
SEAT (7 products)
Skoda (7 products)
Subaru (7 products)
Tesla (7 products)
Toyota (8 products)
TVR (7 products)
Volkswagen (7 products)

Car Model (0)

Car Model

1 Series (E81 | E82 | E87 | E88) 2004 - 2013 (26 products)
1 & 2 Series (F20 | F21 | F22 | F23) 2012 - 2021 (70 products)
1 Series (F40) 2019 - 2024 (21 products)
M2 (F87) 2016 - 2021 (46 products)
2 Series (F44 | F45 | F46) 2020 - Present (16 products)
2 Series (G42) 2021 - Present (19 products)
M2 (G87) 2023 - Present (53 products)
3 Series (E30) 1982 - 1994 (16 products)
3 Series (E36) 1990 - 2000 (18 products)
3 Series (E46) 1997 - 2006 (15 products)
3 Series (E90 | E92 | E93) 2005 - 2011 (28 products)
3 Series (F30 | F31) 2011 - 2019 (41 products)
M3 (F80) 2014 - 2018 (41 products)
3 Series (G20 | G21 | G28) 2018 - Present (24 products)
M3 (G80 | G81) 2020 - Present (64 products)
4 Series (F32 | F33 | F36) 2013 - 2020 (34 products)
M4 (F82 | F83) 2014 - 2020 (39 products)
4 Series (G22 | G23 | G26) 2020 - Present (18 products)
M4 (G82 | G83) 2020 - Present (48 products)
5 Series (F10 | F11) 2010 - 2017 (20 products)
5 Series (G30) 2016 - 2024 (13 products)
M5 (F90) 2017 - Present (23 products)
M6 (F06 | F12 | F13) 2012 - 2019 (18 products)
M8 (F91 | F92 | F93) 2019 - Present (18 products)
X Series (All Models) (36 products)
Z3 (E36/7 | E36/8) 1995 - 2002 (9 products)
Z4 (E85 | E86) 2003 - 2008 (15 products)
Z4 (G29) 2018 - Present (18 products)
MINI JCW CLUBMAN (F54) (3 products)
MINI JCW COUNTRYMAN (F60) (3 products)
Clubman (F54) 2015 - 2024 (3 products)
Clubman (R55) 2007 - 2014 (1 product)
Cooper (F55 | F56 | F57) 2013 - 2024 (4 products)
Cooper (R50 | R52 | R53 | GP1) 2001 - 2008 (1 product)
Cooper (R56 | R57 | GP2) 2006 - 2015 (1 product)
Countryman (F60) 2017 - 2023 (4 products)
GR Yaris Gen 1 (2020 - 2024) (7 products)
GR Supra MK5 (A90) 2019 - Present (3 products)
BMW 5 Series E60 | E61 (5 products)
BMW M5 (E60) (5 products)
BMW M5 (G90 / G99) (1 product)

Shop by Part (0)

Shop by Part

Bushes & Bearings (3 products)
Coilovers & Shock Absorbers (146 products)
Drop Links (11 products)
Engine & ECU (24 products)
Engine Cooling (6 products)
ECU Map | Tuning (3 products)
Engine & ECU (Other) (21 products)
Exhaust (102 products)
Exhaust Valve Control (15 products)
Exterior & Trim (25 products)
Gearbox & Clutch (9 products)
Intake (10 products)
Interior (5 products)
Lowering Springs (24 products)
Splitters & Diffusers (17 products)
Spoilers (5 products)
Suspension (175 products)
Suspension Arms (3 products)
Suspension Kits (158 products)
Seats (7 products)
Top Mounts (1 product)
Wheel Nuts & Studs (2 products)

Brand (0)

Brand

Akrapovic (113 products)
AST (148 products)
Cargraphic (2 products)
Cobra Seats (7 products)
Milltek (24 products)
Mishimoto (1 product)
MMX (58 products)
MOTON (30 products)

Product type (0)

Product type

Chassis alignment (2 products)
Diffuser (17 products)
Engine & ECU (31 products)
Exterior (9 products)
Intake & Exhaust (124 products)
Seats & Interior (12 products)
Suspension (186 products)
Wheels & Tyres (2 products)

Filter and sort Filter

Filter and sort

Filter

383 products

Car Manufacturer

Audi (7 products)
BMW (382 products)
Chevrolet (7 products)
Dodge (7 products)
Ferrari (7 products)
Ford (7 products)
Fiat (7 products)
Honda (7 products)
Hyundai (7 products)
Lamborghini (7 products)
Lotus (7 products)
Mazda (7 products)
Mercedes-Benz (7 products)
MINI (12 products)
Mitsubishi (7 products)
Nissan (7 products)
Peugeot (7 products)
Porsche (7 products)
Renault (7 products)
SEAT (7 products)
Skoda (7 products)
Subaru (7 products)
Tesla (7 products)
Toyota (8 products)
TVR (7 products)
Volkswagen (7 products)

Clear

Car Model

1 Series (E81 | E82 | E87 | E88) 2004 - 2013 (26 products)
1 & 2 Series (F20 | F21 | F22 | F23) 2012 - 2021 (70 products)
1 Series (F40) 2019 - 2024 (21 products)
M2 (F87) 2016 - 2021 (46 products)
2 Series (F44 | F45 | F46) 2020 - Present (16 products)
2 Series (G42) 2021 - Present (19 products)
M2 (G87) 2023 - Present (53 products)
3 Series (E30) 1982 - 1994 (16 products)
3 Series (E36) 1990 - 2000 (18 products)
3 Series (E46) 1997 - 2006 (15 products)
3 Series (E90 | E92 | E93) 2005 - 2011 (28 products)
3 Series (F30 | F31) 2011 - 2019 (41 products)
M3 (F80) 2014 - 2018 (41 products)
3 Series (G20 | G21 | G28) 2018 - Present (24 products)
M3 (G80 | G81) 2020 - Present (64 products)
4 Series (F32 | F33 | F36) 2013 - 2020 (34 products)
M4 (F82 | F83) 2014 - 2020 (39 products)
4 Series (G22 | G23 | G26) 2020 - Present (18 products)
M4 (G82 | G83) 2020 - Present (48 products)
5 Series (F10 | F11) 2010 - 2017 (20 products)
5 Series (G30) 2016 - 2024 (13 products)
M5 (F90) 2017 - Present (23 products)
M6 (F06 | F12 | F13) 2012 - 2019 (18 products)
M8 (F91 | F92 | F93) 2019 - Present (18 products)
X Series (All Models) (36 products)
Z3 (E36/7 | E36/8) 1995 - 2002 (9 products)
Z4 (E85 | E86) 2003 - 2008 (15 products)
Z4 (G29) 2018 - Present (18 products)
MINI JCW CLUBMAN (F54) (3 products)
MINI JCW COUNTRYMAN (F60) (3 products)
Clubman (F54) 2015 - 2024 (3 products)
Clubman (R55) 2007 - 2014 (1 products)
Cooper (F55 | F56 | F57) 2013 - 2024 (4 products)
Cooper (R50 | R52 | R53 | GP1) 2001 - 2008 (1 products)
Cooper (R56 | R57 | GP2) 2006 - 2015 (1 products)
Countryman (F60) 2017 - 2023 (4 products)
GR Yaris Gen 1 (2020 - 2024) (7 products)
GR Supra MK5 (A90) 2019 - Present (3 products)
BMW 5 Series E60 | E61 (5 products)
BMW M5 (E60) (5 products)
BMW M5 (G90 / G99) (1 products)

Clear

Shop by Part

Bushes & Bearings (3 products)
Coilovers & Shock Absorbers (146 products)
Drop Links (11 products)
Engine & ECU (24 products)
Engine Cooling (6 products)
ECU Map | Tuning (3 products)
Engine & ECU (Other) (21 products)
Exhaust (102 products)
Exhaust Valve Control (15 products)
Exterior & Trim (25 products)
Gearbox & Clutch (9 products)
Intake (10 products)
Interior (5 products)
Lowering Springs (24 products)
Splitters & Diffusers (17 products)
Spoilers (5 products)
Suspension (175 products)
Suspension Arms (3 products)
Suspension Kits (158 products)
Seats (7 products)
Top Mounts (1 products)
Wheel Nuts & Studs (2 products)

Clear

Brand

Akrapovic (113 products)
AST (148 products)
Cargraphic (2 products)
Cobra Seats (7 products)
Milltek (24 products)
Mishimoto (1 products)
MMX (58 products)
MOTON (30 products)

Clear

Product type

Chassis alignment (2 products)
Diffuser (17 products)
Engine & ECU (31 products)
Exterior (9 products)
Intake & Exhaust (124 products)
Seats & Interior (12 products)
Suspension (186 products)
Wheels & Tyres (2 products)

Clear

Sort by:

Remove all

383 products

MMX Crank Hub Capture Plate | BMW S55 | N55

MMX Crank Hub Capture Plate | BMW S55 | N55

Regular price £120.11 GBP

Regular price Sale price £120.11 GBP
MMX Billet Gear Shift Knob for BMW (All 6 Speed Manual Cars)

MMX Billet Gear Shift Knob for BMW (All 6 Speed Manual Cars)

Regular price £104.99 GBP

Regular price Sale price £104.99 GBP
MMX Billet Differential Inserts for BMW F Series

MMX Billet Differential Inserts for BMW F Series

Regular price £104.99 GBP

Regular price Sale price £104.99 GBP
MMX Billet Aluminium Coolant Cap 90mm for BMW - 17117639021

MMX Billet Aluminium Coolant Cap 90mm for BMW - 17117639021

Regular price £101.49 GBP

Regular price Sale price £101.49 GBP
MMX Oil Filter Housing for BMW B58 & B57 Engine

MMX Oil Filter Housing for BMW B58 & B57 Engine

Regular price £101.49 GBP

Regular price Sale price £101.49 GBP
MMX Oil filter housing for BMW S58 Engine M2 (G87) M3 (G80 G81) M4 (G82 G83)

MMX Oil filter housing for BMW S58 Engine M2 (G87) M3 (G80 G81) M4 (G82 G83)

Regular price £101.49 GBP

Regular price Sale price £101.49 GBP
MMX Elite Series Panel Filter for BMW N57 Diesel Engine 3 Series (F30 F31) 4 Series (F32 F33)

MMX Elite Series Panel Filter for BMW N57 Diesel Engine 3 Series (F30 F31) 4 Series (F32 F33)

Regular price £106.32 GBP

Regular price Sale price £106.32 GBP
MMX Oil Filter Housing for BMW N54, N55 & S55 Engine

MMX Oil Filter Housing for BMW N54, N55 & S55 Engine

Regular price £93.31 GBP

Regular price Sale price £93.31 GBP
MMX Billet Aluminium Fuel Filler Cap for all BMW Models

MMX Billet Aluminium Fuel Filler Cap for all BMW Models

Regular price £87.36 GBP

Regular price Sale price £87.36 GBP
MMX Billet Aluminium Oil Filler Cap Gloss Black - BMW - 11128655331

MMX Billet Aluminium Oil Filler Cap Gloss Black - BMW - 11128655331

Regular price £81.89 GBP

Regular price Sale price £81.89 GBP
MMX Performance Billet Oil Filler Cap – BMW S58 & B48E - 11128654637

MMX Performance Billet Oil Filler Cap – BMW S58 & B48E - 11128654637

Regular price £81.89 GBP

Regular price Sale price £81.89 GBP
MMX Performance Silicone Intake Hose – BMW B58 (F-Series)

MMX Performance Silicone Intake Hose – BMW B58 (F-Series)

Regular price £73.50 GBP

Regular price Sale price £73.50 GBP
MMX Performance Elite Series Panel Air Filter – BMW N55 (F-Series)

MMX Performance Elite Series Panel Air Filter – BMW N55 (F-Series)

Regular price £66.00 GBP

Regular price Sale price £66.00 GBP
MMX Performance Cotton Gauze Panel Air Filters – BMW N55 (F-Series)

MMX Performance Cotton Gauze Panel Air Filters – BMW N55 (F-Series)

Regular price £65.51 GBP

Regular price Sale price £65.51 GBP
MMX Performance Cotton Gauze Panel Air Filter – BMW B48 / B58 / B58TU

MMX Performance Cotton Gauze Panel Air Filter – BMW B48 / B58 / B58TU

Regular price £65.51 GBP

Regular price Sale price £65.51 GBP
MMX Performance Cotton Gauze Panel Air Filters – BMW F2x & F3x N20 (F-Series)

MMX Performance Cotton Gauze Panel Air Filters – BMW F2x & F3x N20 (F-Series)

Regular price £65.51 GBP

Regular price Sale price £65.51 GBP
MMX Performance Elite Series Panel Air Filter – BMW N54 (E8x E9x) 135i 335i

MMX Performance Elite Series Panel Air Filter – BMW N54 (E8x E9x) 135i 335i

Regular price £64.00 GBP

Regular price Sale price £64.00 GBP
MMX Lifetime Stainless Steel Oil Filter – BMW B58 & B57 (3.0L) - 11427826799

MMX Lifetime Stainless Steel Oil Filter – BMW B58 & B57 (3.0L) - 11427826799

Regular price £52.49 GBP

Regular price Sale price £52.49 GBP
MMX Lifetime Stainless Steel Oil Filter – BMW S58 (2019+) - 11428092620

MMX Lifetime Stainless Steel Oil Filter – BMW S58 (2019+) - 11428092620

Regular price £52.49 GBP

Regular price Sale price £52.49 GBP
MMX Performance Billet Washer Fluid Cap – BMW F-Series

MMX Performance Billet Washer Fluid Cap – BMW F-Series

Regular price £49.99 GBP

Regular price Sale price £49.99 GBP
MMX Performance Low Oil Temperature Thermostat – BMW N54 & N55

MMX Performance Low Oil Temperature Thermostat – BMW N54 & N55

Regular price £45.50 GBP

Regular price Sale price £45.50 GBP
MMX Performance High-Output Ignition Coil - BMW (F8X) M2 M3 M4 (F2x) M135i M235i

MMX Performance High-Output Ignition Coil - BMW (F8X) M2 M3 M4 (F2x) M135i M235i

Regular price £24.99 GBP

Regular price Sale price £24.99 GBP
MMX Magnetic oil sump plug for BMW & MINI

MMX Magnetic oil sump plug for BMW & MINI

Regular price £24.20 GBP

Regular price Sale price £24.20 GBP
MMX Performance Magnetic Differential Plug – BMW (M22 × 1.5)

MMX Performance Magnetic Differential Plug – BMW (M22 × 1.5)

Regular price £24.02 GBP

Regular price Sale price £24.02 GBP

1
2
3
4
5
6
…
16

Quick links

Search
Delivery & Returns
Contact

Broke-Smith Motorsport Ltd is a company registered in England and Wales with Company number 08407237

Facebook
Instagram
YouTube

Payment methods

© 2026, String Theory Garage

Choosing a selection results in a full page refresh.
Opens in a new window.