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

AST Adjustable Drop Links - BMW M4 F82 | F83

AST Adjustable Drop Links - BMW M4 F82 | F83

Regular price £150.00 GBP

Regular price Sale price £150.00 GBP
AST Adjustable Drop Links - BMW M4 G82 | G83

AST Adjustable Drop Links - BMW M4 G82 | G83

Regular price £150.00 GBP

Regular price Sale price £150.00 GBP
AST Adjustable Lowering Springs - BMW 4 Series (G82 / G83) M4 | M4 Convertible (2021 - Present)

Sale

AST Adjustable Lowering Springs - BMW 4 Series (G82 / G83) M4 | M4 Convertible (2021 - Present)

Regular price £750.00 GBP

Regular price ~~£780.00 GBP~~ Sale price £750.00 GBP

Sale
AST Adjustable Lowering Springs - BMW M4 Convertible (F83) 2015 - 2018

Sale

AST Adjustable Lowering Springs - BMW M4 Convertible (F83) 2015 - 2018

Regular price £750.00 GBP

Regular price ~~£780.00 GBP~~ Sale price £750.00 GBP

Sale
AST Adjustable Lowering Springs - BMW M4 Pre LCI & LCI (F82) 2012 - 2018

Sale

AST Adjustable Lowering Springs - BMW M4 Pre LCI & LCI (F82) 2012 - 2018

Regular price £750.00 GBP

Regular price ~~£780.00 GBP~~ Sale price £750.00 GBP

Sale
AST Front Adjustable Top Mounts / Camber Plates Set of 2 - BMW G8X M2 M3 M4 2021 - Present

Sale

AST Front Adjustable Top Mounts / Camber Plates Set of 2 - BMW G8X M2 M3 M4 2021 - Present

Regular price £704.17 GBP

Regular price ~~£730.00 GBP~~ Sale price £704.17 GBP

Sale
AST MOTON Front Arch Clearance Kit - BMW M3 (G80/1) M4 (G82/3) M2 (G87)

AST MOTON Front Arch Clearance Kit - BMW M3 (G80/1) M4 (G82/3) M2 (G87)

Regular price £110.00 GBP

Regular price Sale price £110.00 GBP
AST MOTON Front Control Arm Bearing Set of 2 - BMW G8X M2 M3 M4 2021 - Present

Sale

AST MOTON Front Control Arm Bearing Set of 2 - BMW G8X M2 M3 M4 2021 - Present

Regular price £228.00 GBP

Regular price ~~£240.00 GBP~~ Sale price £228.00 GBP

Sale
AST Suspension 5100 Competition 1-way Adjustable Coilovers - BMW M4 F82 (3-Bolt)

Sale

AST Suspension 5100 Competition 1-way Adjustable Coilovers - BMW M4 F82 (3-Bolt)

Regular price £2,833.33 GBP

Regular price ~~£2,920.00 GBP~~ Sale price £2,833.33 GBP

Sale
AST Suspension 5100 Competition 1-way Adjustable Coilovers - BMW M4 F82 (5-Bolt)

Sale

AST Suspension 5100 Competition 1-way Adjustable Coilovers - BMW M4 F82 (5-Bolt)

Regular price £2,833.33 GBP

Regular price ~~£2,920.00 GBP~~ Sale price £2,833.33 GBP

Sale
AST Suspension 5100 Competition 1-way Adjustable Coilovers - BMW M4 G82 RWD

Sale

AST Suspension 5100 Competition 1-way Adjustable Coilovers - BMW M4 G82 RWD

Regular price £2,916.67 GBP

Regular price ~~£3,010.00 GBP~~ Sale price £2,916.67 GBP

Sale
AST Suspension 5100 Competition 1-way Adjustable Coilovers - BMW M4 G82 xDrive

Sale

AST Suspension 5100 Competition 1-way Adjustable Coilovers - BMW M4 G82 xDrive

Regular price £2,916.67 GBP

Regular price ~~£3,010.00 GBP~~ Sale price £2,916.67 GBP

Sale
AST Suspension 5100 Street 1-way Adjustable Coilovers - BMW M4 F82 (3-Bolt)

Sale

AST Suspension 5100 Street 1-way Adjustable Coilovers - BMW M4 F82 (3-Bolt)

Regular price From £2,125.00 GBP

Regular price ~~£2,200.00 GBP~~ Sale price From £2,125.00 GBP

Sale
AST Suspension 5100 Street 1-way Adjustable Coilovers - BMW M4 F82 (5-Bolt)

Sale

AST Suspension 5100 Street 1-way Adjustable Coilovers - BMW M4 F82 (5-Bolt)

Regular price From £2,125.00 GBP

Regular price ~~£2,200.00 GBP~~ Sale price From £2,125.00 GBP

Sale
AST Suspension 5100 Street 1-way Adjustable Coilovers - BMW M4 G82 RWD

Sale

AST Suspension 5100 Street 1-way Adjustable Coilovers - BMW M4 G82 RWD

Regular price From £2,250.00 GBP

Regular price ~~£2,340.00 GBP~~ Sale price From £2,250.00 GBP

Sale
AST Suspension 5100 Street 1-way Adjustable Coilovers - BMW M4 G82 xDrive

Sale

AST Suspension 5100 Street 1-way Adjustable Coilovers - BMW M4 G82 xDrive

Regular price From £2,250.00 GBP

Regular price ~~£2,340.00 GBP~~ Sale price From £2,250.00 GBP

Sale
BMW M2 / M3 / M4 (G87 / G80 / G81 / G82 / G83) | Akrapovic | Octagonal Tail Pipe Set (Carbon)

BMW M2 / M3 / M4 (G87 / G80 / G81 / G82 / G83) | Akrapovic | Octagonal Tail Pipe Set (Carbon)

Regular price £1,550.45 GBP

Regular price Sale price £1,550.45 GBP
BMW M2 / M3 / M4 (G87 / G80 / G81 / G82 / G83) | Akrapovic | Octagonal Tail Pipe Set (Forged Carbon)

BMW M2 / M3 / M4 (G87 / G80 / G81 / G82 / G83) | Akrapovic | Octagonal Tail Pipe Set (Forged Carbon)

Regular price £1,627.93 GBP

Regular price Sale price £1,627.93 GBP
BMW M2 / M3 / M4 (G87 / G80 / G81 / G82 / G83) | Akrapovic | Round Tail Pipe Set (Carbon)

BMW M2 / M3 / M4 (G87 / G80 / G81 / G82 / G83) | Akrapovic | Round Tail Pipe Set (Carbon)

Regular price £1,436.04 GBP

Regular price Sale price £1,436.04 GBP
BMW M2 Competition / CS / M3 / M4 (F87N / F80 / F82 / F83) | Akrapovic | Downpipe Exhaust (SS)

BMW M2 Competition / CS / M3 / M4 (F87N / F80 / F82 / F83) | Akrapovic | Downpipe Exhaust (SS)

Regular price £1,327.93 GBP

Regular price Sale price £1,327.93 GBP
BMW M3 / M4 (F80 / F82 / F83) | Akrapovic | Evolution Link Pipe Set (Titanium)

BMW M3 / M4 (F80 / F82 / F83) | Akrapovic | Evolution Link Pipe Set (Titanium)

Regular price £1,882.88 GBP

Regular price Sale price £1,882.88 GBP
BMW M3 / M4 (F80 / F82 / F83) | Akrapovic | Rear Carbon Diffuser (High Gloss)

BMW M3 / M4 (F80 / F82 / F83) | Akrapovic | Rear Carbon Diffuser (High Gloss)

Regular price £1,252.25 GBP

Regular price Sale price £1,252.25 GBP
BMW M3 / M4 (F80 / F82 / F83) | Akrapovic | Rear Carbon Diffuser (Matte)

BMW M3 / M4 (F80 / F82 / F83) | Akrapovic | Rear Carbon Diffuser (Matte)

Regular price £930.63 GBP

Regular price Sale price £930.63 GBP
BMW M3 / M4 (F80 / F82 / F83) | Akrapovic | Slip-On Line Exhaust System (Titanium)

BMW M3 / M4 (F80 / F82 / F83) | Akrapovic | Slip-On Line Exhaust System (Titanium)

Regular price £3,216.22 GBP

Regular price Sale price £3,216.22 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.