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 M4

You are now browsing for BMW M4 Parts & Upgrades

Here... Read More

You are now browsing for BMW M4 Parts & Upgrades

Here at String Theory Garage we stock a large and ever expanding range of BMW Parts. A complete range of upgrades. From Suspension upgrades to ECU tuning we have you covered.

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.

BMW M4

Sort by:

69 products

Filter:

Car Manufacturer (0) Match all

Car Manufacturer

BMW (68 products)
MINI (6 products)
Toyota (1 product)

Car Model (0)

Car Model

1 Series (E81 | E82 | E87 | E88) 2004 - 2013 (8 products)
1 & 2 Series (F20 | F21 | F22 | F23) 2012 - 2021 (16 products)
1 Series (F40) 2019 - 2024 (13 products)
M2 (F87) 2016 - 2021 (21 products)
2 Series (F44 | F45 | F46) 2020 - Present (11 products)
2 Series (G42) 2021 - Present (11 products)
M2 (G87) 2023 - Present (29 products)
3 Series (E30) 1982 - 1994 (5 products)
3 Series (E36) 1990 - 2000 (5 products)
3 Series (E46) 1997 - 2006 (5 products)
3 Series (E90 | E92 | E93) 2005 - 2011 (8 products)
3 Series (F30 | F31) 2011 - 2019 (16 products)
M3 (F80) 2014 - 2018 (28 products)
3 Series (G20 | G21 | G28) 2018 - Present (11 products)
M3 (G80 | G81) 2020 - Present (43 products)
4 Series (F32 | F33 | F36) 2013 - 2020 (15 products)
M4 (F82 | F83) 2014 - 2020 (36 products)
4 Series (G22 | G23 | G26) 2020 - Present (11 products)
M4 (G82 | G83) 2020 - Present (43 products)
5 Series (F10 | F11) 2010 - 2017 (13 products)
5 Series (G30) 2016 - 2024 (12 products)
M5 (F90) 2017 - Present (14 products)
M6 (F06 | F12 | F13) 2012 - 2019 (13 products)
M8 (F91 | F92 | F93) 2019 - Present (12 products)
X Series (All Models) (15 products)
Z3 (E36/7 | E36/8) 1995 - 2002 (5 products)
Z4 (E85 | E86) 2003 - 2008 (5 products)
Z4 (G29) 2018 - Present (11 products)
MINI JCW CLUBMAN (F54) (3 products)
MINI JCW COUNTRYMAN (F60) (3 products)
Clubman (F54) 2015 - 2024 (2 products)
Clubman (R55) 2007 - 2014 (1 product)
Cooper (F55 | F56 | F57) 2013 - 2024 (5 products)
Cooper (R50 | R52 | R53 | GP1) 2001 - 2008 (1 product)
Cooper (R56 | R57 | GP2) 2006 - 2015 (1 product)
Countryman (F60) 2017 - 2023 (4 products)
BMW 5 Series E60 | E61 (5 products)
BMW M5 (E60) (5 products)

Shop by Part (0)

Shop by Part

Bushes & Bearings (3 products)
Coilovers & Shock Absorbers (8 products)
Drop Links (5 products)
Engine & ECU (10 products)
ECU Map | Tuning (1 product)
Engine & ECU (Other) (10 products)
Exhaust (11 products)
Exhaust Valve Control (3 products)
Exterior & Trim (8 products)
Gearbox & Clutch (5 products)
Intake (4 products)
Interior (3 products)
Lowering Springs (3 products)
Splitters & Diffusers (4 products)
Suspension (18 products)
Suspension Arms (3 products)
Suspension Kits (11 products)
Top Mounts (1 product)
Wheel Nuts & Studs (2 products)
Wheel Spacers (2 products)

Brand (0)

Brand

Akrapovic (17 products)
AST (16 products)
Cargraphic (1 product)
Hardrace (1 product)
Mishimoto (1 product)
MMX (33 products)

Product type (0)

Product type

Chassis alignment (1 product)
Diffuser (4 products)
Engine & ECU (16 products)
Exterior (4 products)
Intake & Exhaust (16 products)
Seats & Interior (3 products)
Suspension (21 products)
Wheels & Tyres (4 products)

Filter and sort Filter

Filter and sort

Filter

69 products

Car Manufacturer

BMW (68 products)
MINI (6 products)
Toyota (1 products)

Clear

Car Model

1 Series (E81 | E82 | E87 | E88) 2004 - 2013 (8 products)
1 & 2 Series (F20 | F21 | F22 | F23) 2012 - 2021 (16 products)
1 Series (F40) 2019 - 2024 (13 products)
M2 (F87) 2016 - 2021 (21 products)
2 Series (F44 | F45 | F46) 2020 - Present (11 products)
2 Series (G42) 2021 - Present (11 products)
M2 (G87) 2023 - Present (29 products)
3 Series (E30) 1982 - 1994 (5 products)
3 Series (E36) 1990 - 2000 (5 products)
3 Series (E46) 1997 - 2006 (5 products)
3 Series (E90 | E92 | E93) 2005 - 2011 (8 products)
3 Series (F30 | F31) 2011 - 2019 (16 products)
M3 (F80) 2014 - 2018 (28 products)
3 Series (G20 | G21 | G28) 2018 - Present (11 products)
M3 (G80 | G81) 2020 - Present (43 products)
4 Series (F32 | F33 | F36) 2013 - 2020 (15 products)
M4 (F82 | F83) 2014 - 2020 (36 products)
4 Series (G22 | G23 | G26) 2020 - Present (11 products)
M4 (G82 | G83) 2020 - Present (43 products)
5 Series (F10 | F11) 2010 - 2017 (13 products)
5 Series (G30) 2016 - 2024 (12 products)
M5 (F90) 2017 - Present (14 products)
M6 (F06 | F12 | F13) 2012 - 2019 (13 products)
M8 (F91 | F92 | F93) 2019 - Present (12 products)
X Series (All Models) (15 products)
Z3 (E36/7 | E36/8) 1995 - 2002 (5 products)
Z4 (E85 | E86) 2003 - 2008 (5 products)
Z4 (G29) 2018 - Present (11 products)
MINI JCW CLUBMAN (F54) (3 products)
MINI JCW COUNTRYMAN (F60) (3 products)
Clubman (F54) 2015 - 2024 (2 products)
Clubman (R55) 2007 - 2014 (1 products)
Cooper (F55 | F56 | F57) 2013 - 2024 (5 products)
Cooper (R50 | R52 | R53 | GP1) 2001 - 2008 (1 products)
Cooper (R56 | R57 | GP2) 2006 - 2015 (1 products)
Countryman (F60) 2017 - 2023 (4 products)
BMW 5 Series E60 | E61 (5 products)
BMW M5 (E60) (5 products)

Clear

Shop by Part

Bushes & Bearings (3 products)
Coilovers & Shock Absorbers (8 products)
Drop Links (5 products)
Engine & ECU (10 products)
ECU Map | Tuning (1 products)
Engine & ECU (Other) (10 products)
Exhaust (11 products)
Exhaust Valve Control (3 products)
Exterior & Trim (8 products)
Gearbox & Clutch (5 products)
Intake (4 products)
Interior (3 products)
Lowering Springs (3 products)
Splitters & Diffusers (4 products)
Suspension (18 products)
Suspension Arms (3 products)
Suspension Kits (11 products)
Top Mounts (1 products)
Wheel Nuts & Studs (2 products)
Wheel Spacers (2 products)

Clear

Brand

Akrapovic (17 products)
AST (16 products)
Cargraphic (1 products)
Hardrace (1 products)
Mishimoto (1 products)
MMX (33 products)

Clear

Product type

Chassis alignment (1 products)
Diffuser (4 products)
Engine & ECU (16 products)
Exterior (4 products)
Intake & Exhaust (16 products)
Seats & Interior (3 products)
Suspension (21 products)
Wheels & Tyres (4 products)

Clear

Sort by:

Remove all

69 products

MMX Front Control Arm Spherical Bushings | BMW G8x M2, M3 & M4

MMX Front Control Arm Spherical Bushings | BMW G8x M2, M3 & M4

Regular price £299.99 GBP

Regular price ~~£288.00 GBP~~ Sale price £299.99 GBP
MMX Front Wheel Arch Clearance Kit for BMW M2 M3 M4 (G80 G81 G82 G83 G87)

MMX Front Wheel Arch Clearance Kit for BMW M2 M3 M4 (G80 G81 G82 G83 G87)

Regular price £179.99 GBP

Regular price Sale price £179.99 GBP
MMX Gear shift paddles | F Series | Titanium Magnetic Paddle Inc Fitting kit

MMX Gear shift paddles | F Series | Titanium Magnetic Paddle Inc Fitting kit

Regular price £323.99 GBP

Regular price Sale price £323.99 GBP
MMX Gear shift paddles | G Series | Titanium Magnetic Paddle Inc Fitting kit

MMX Gear shift paddles | G Series | Titanium Magnetic Paddle Inc Fitting kit

Regular price £323.99 GBP

Regular price Sale price £323.99 GBP
MMX High-Capacity Baffled Differential Sump | BMW G8x M2, M3 & M4 (S58)

MMX High-Capacity Baffled Differential Sump | BMW G8x M2, M3 & M4 (S58)

Regular price £1,439.99 GBP

Regular price Sale price £1,439.99 GBP
MMX High-Flow Turbo Inlet Elbows | BMW G8X M2, M3 & M4 (S58)

MMX High-Flow Turbo Inlet Elbows | BMW G8X M2, M3 & M4 (S58)

Regular price £359.99 GBP

Regular price Sale price £359.99 GBP
MMX Hubcentric Wheel Spacers for BMW F-Series 12mm | 15mm

MMX Hubcentric Wheel Spacers for BMW F-Series 12mm | 15mm

Regular price From £94.50 GBP

Regular price Sale price From £94.50 GBP
MMX Hubcentric Wheel Spacers for BMW G-Series 12mm | 15mm | 18mm

MMX Hubcentric Wheel Spacers for BMW G-Series 12mm | 15mm | 18mm

Regular price From £94.50 GBP

Regular price Sale price From £94.50 GBP
MMX Lifetime Stainless Steel Oil Filter – BMW S58 (2019+) - 11428092620

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

Regular price £62.99 GBP

Regular price Sale price £62.99 GBP
MMX Locking Tapered Seat Wheel Nut Kit for BMW

MMX Locking Tapered Seat Wheel Nut Kit for BMW

Regular price £47.99 GBP

Regular price Sale price £47.99 GBP
MMX Magnetic oil sump plug for BMW & MINI

MMX Magnetic oil sump plug for BMW & MINI

Regular price £29.04 GBP

Regular price Sale price £29.04 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 £121.79 GBP

Regular price Sale price £121.79 GBP
MMX Performance Billet Oil Filler Cap – BMW S58 & B48E - 11128654637

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

Regular price £98.27 GBP

Regular price Sale price £98.27 GBP
MMX Performance Billet Temperature Adaptor – BMW N54 / N55 / S55

MMX Performance Billet Temperature Adaptor – BMW N54 / N55 / S55

Regular price £19.64 GBP

Regular price Sale price £19.64 GBP
MMX Performance Billet Washer Fluid Cap – BMW F-Series

MMX Performance Billet Washer Fluid Cap – BMW F-Series

Regular price £59.99 GBP

Regular price Sale price £59.99 GBP
MMX Performance Car Badge – Chrome or Gloss Black (100mm)

MMX Performance Car Badge – Chrome or Gloss Black (100mm)

Regular price £9.83 GBP

Regular price Sale price £9.83 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 £29.99 GBP

Regular price Sale price £29.99 GBP
MMX Performance Magnetic Differential Plug – BMW (M22 × 1.5)

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

Regular price £28.82 GBP

Regular price Sale price £28.82 GBP
MMX Performance Stud & Nut Conversion Kit for BMW & MINI M14x1.25

MMX Performance Stud & Nut Conversion Kit for BMW & MINI M14x1.25

Regular price £157.25 GBP

Regular price Sale price £157.25 GBP
MMX Power Control Module Tuning Box Tuning Box - BMW G82 M4

MMX Power Control Module Tuning Box Tuning Box - BMW G82 M4

Regular price £899.99 GBP

Regular price Sale price £899.99 GBP
MMX Ultimate S58 Intake Solution | BMW G8x M2, M3 & M4

MMX Ultimate S58 Intake Solution | BMW G8x M2, M3 & M4

Regular price £997.22 GBP

Regular price Sale price £997.22 GBP

1
2
3

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.