Collection: BMW
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.
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Cobra Sebring T Low Profile Motorsport Seat - FIA Approved
Regular price From £565.83 GBPRegular priceSale price From £565.83 GBP -
Cobra Ultralite Pro-Fit Motorsport Seat - FIA Approved
Regular price From £2,299.17 GBPRegular priceSale price From £2,299.17 GBP -
Cobra Sebring T Pro-Fit Motorsport Seat - FIA Approved
Regular price From £565.83 GBPRegular priceSale price From £565.83 GBP -
Cobra Suzuka T Pro-Fit Motorsport Seat - FIA Approved
Regular price From £524.17 GBPRegular priceSale price From £524.17 GBP -
Cobra Evolution T Pro-Fit Motorsport Seat - FIA Approved
Regular price From £565.83 GBPRegular priceSale price From £565.83 GBP -
Cobra Aqua 4x4 Motorsport Seat
Regular price From £532.50 GBPRegular priceSale price From £532.50 GBP -
Cobra Imola T Motorsport Seat - FIA Approved
Regular price From £482.50 GBPRegular priceSale price From £482.50 GBP -
Milltek Secondary Cat Back Non-Resonated Exhaust System for BMW M2 G87 | Non OPF
Regular price From £2,391.63 GBPRegular priceSale price From £2,391.63 GBP -
Milltek Centre Resonator Back Exhaust System for BMW M2 G87 | OPF/GPF Models
Regular price From £2,278.29 GBPRegular priceSale price From £2,278.29 GBP -
Milltek Resonated OPF Back Exhaust System for BMW M2 G87 | OPF/GPF Models
Regular price From £2,385.39 GBPRegular priceSale price From £2,385.39 GBP -
Milltek Resonated Cat Back Race Exhaust System for BMW M240i F22 LCI | Non OPF & Non xDrive
Regular price From £1,176.08 GBPRegular priceSale price From £1,176.08 GBP -
Milltek Non-Resonated Cat Back Race Exhaust System for BMW M240i F22 LCI | Non OPF & Non xDrive
Regular price From £1,319.49 GBPRegular priceSale price From £1,319.49 GBP -
Milltek Non-Resonated Cat Back Race Exhaust System for BMW M235i F22 | Non xDrive
Regular price From £1,213.33 GBPRegular priceSale price From £1,213.33 GBP -
Milltek Resonated Cat Back Exhaust System for BMW M235i F22 | Non xDrive
Regular price From £1,069.92 GBPRegular priceSale price From £1,069.92 GBP -
Milltek Non-Resonated OPF Back Exhaust System for BMW M140i F20 & F21 | LCI | OPF/GPF Only
Regular price From £1,079.69 GBPRegular priceSale price From £1,079.69 GBP -
Milltek Resonated OPF Back Exhaust System for BMW M140i F20 & F21 | LCI | OPF/GPF Only
Regular price From £1,200.10 GBPRegular priceSale price From £1,200.10 GBP -
Milltek Resonated Cat Back Exhaust System for BMW M140i F20 & F21 | LCI | Non OPF
Regular price From £1,284.84 GBPRegular priceSale price From £1,284.84 GBP -
Milltek Non-Resonated Cat Back Race Exhaust System for BMW M140i F20 & F21 | LCI | Non OPF
Regular price From £1,399.19 GBPRegular priceSale price From £1,399.19 GBP -
Milltek 3" Road Rear Silencer for BMW M135i F20 | F21 (Non xDrive) EC Approved
Regular price From £721.94 GBPRegular priceSale price From £721.94 GBP -
Milltek 3" Race Rear Silencer for BMW M135i F20 | F21 (Non xDrive)
Regular price From £724.09 GBPRegular priceSale price From £724.09 GBP -
Milltek Non-Resonated Cat Back Road Exhaust System for BMW M135i F20 | F21 (Non xDrive)
Regular price From £1,076.42 GBPRegular priceSale price From £1,076.42 GBP -
Milltek Non-Resonated Cat Back Race Exhaust System for BMW M135i F20 | F21 (Non xDrive)
Regular price From £1,078.57 GBPRegular priceSale price From £1,078.57 GBP -
Milltek OPF/GPF Back Race (Louder) Exhaust System for BMW M2 F87 Competition
Regular price From £1,922.62 GBPRegular priceSale price From £1,922.62 GBP -
Milltek OPF/GPF Back Equal Length (Loudest) Exhaust System for BMW M2 F87 Competition
Regular price From £2,012.51 GBPRegular priceSale price From £2,012.51 GBP



















