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 £679.00 GBPRegular priceSale price From £679.00 GBP -
Cobra Ultralite Pro-Fit Motorsport Seat - FIA Approved
Regular price From £2,759.00 GBPRegular priceSale price From £2,759.00 GBP -
Cobra Sebring T Pro-Fit Motorsport Seat - FIA Approved
Regular price From £679.00 GBPRegular priceSale price From £679.00 GBP -
Cobra Suzuka T Pro-Fit Motorsport Seat - FIA Approved
Regular price From £629.00 GBPRegular priceSale price From £629.00 GBP -
Cobra Evolution T Pro-Fit Motorsport Seat - FIA Approved
Regular price From £679.00 GBPRegular priceSale price From £679.00 GBP -
Cobra Aqua 4x4 Motorsport Seat
Regular price From £639.00 GBPRegular priceSale price From £639.00 GBP -
Cobra Imola T Motorsport Seat - FIA Approved
Regular price From £579.00 GBPRegular priceSale price From £579.00 GBP -
Milltek Secondary Cat Back Non-Resonated Exhaust System for BMW M2 G87 | Non OPF
Regular price From £2,295.96 GBPRegular price£2,869.96 GBPSale price From £2,295.96 GBPSale -
Milltek Centre Resonator Back Exhaust System for BMW M2 G87 | OPF/GPF Models
Regular price From £2,187.16 GBPRegular price£2,733.95 GBPSale price From £2,187.16 GBPSale -
Milltek Resonated OPF Back Exhaust System for BMW M2 G87 | OPF/GPF Models
Regular price From £2,289.97 GBPRegular price£2,862.47 GBPSale price From £2,289.97 GBPSale -
Milltek Resonated Cat Back Race Exhaust System for BMW M240i F22 LCI | Non OPF & Non xDrive
Regular price From £1,129.04 GBPRegular price£1,411.30 GBPSale price From £1,129.04 GBPSale -

Milltek Non-Resonated Cat Back Race Exhaust System for BMW M240i F22 LCI | Non OPF & Non xDrive
Regular price From £1,266.71 GBPRegular price£1,583.39 GBPSale price From £1,266.71 GBPSale -
Milltek Non-Resonated Cat Back Race Exhaust System for BMW M235i F22 | Non xDrive
Regular price From £1,164.80 GBPRegular price£1,456.00 GBPSale price From £1,164.80 GBPSale -
Milltek Resonated Cat Back Exhaust System for BMW M235i F22 | Non xDrive
Regular price From £1,027.12 GBPRegular price£1,283.90 GBPSale price From £1,027.12 GBPSale -
Milltek Non-Resonated OPF Back Exhaust System for BMW M140i F20 & F21 | LCI | OPF/GPF Only
Regular price From £1,036.50 GBPRegular price£1,295.63 GBPSale price From £1,036.50 GBPSale -
Milltek Resonated OPF Back Exhaust System for BMW M140i F20 & F21 | LCI | OPF/GPF Only
Regular price From £1,152.09 GBPRegular price£1,440.12 GBPSale price From £1,152.09 GBPSale -
Milltek Resonated Cat Back Exhaust System for BMW M140i F20 & F21 | LCI | Non OPF
Regular price From £1,233.44 GBPRegular price£1,541.81 GBPSale price From £1,233.44 GBPSale -
Milltek Non-Resonated Cat Back Race Exhaust System for BMW M140i F20 & F21 | LCI | Non OPF
Regular price From £1,343.22 GBPRegular price£1,679.03 GBPSale price From £1,343.22 GBPSale -
Milltek 3" Road Rear Silencer for BMW M135i F20 | F21 (Non xDrive) EC Approved
Regular price From £693.06 GBPRegular price£866.33 GBPSale price From £693.06 GBPSale -
Milltek 3" Race Rear Silencer for BMW M135i F20 | F21 (Non xDrive)
Regular price From £695.12 GBPRegular price£868.91 GBPSale price From £695.12 GBPSale -
Milltek Non-Resonated Cat Back Road Exhaust System for BMW M135i F20 | F21 (Non xDrive)
Regular price From £1,033.36 GBPRegular price£1,291.70 GBPSale price From £1,033.36 GBPSale -
Milltek Non-Resonated Cat Back Race Exhaust System for BMW M135i F20 | F21 (Non xDrive)
Regular price From £1,035.42 GBPRegular price£1,294.28 GBPSale price From £1,035.42 GBPSale -
Milltek OPF/GPF Back Race (Louder) Exhaust System for BMW M2 F87 Competition
Regular price From £1,845.71 GBPRegular price£2,307.14 GBPSale price From £1,845.71 GBPSale -
Milltek OPF/GPF Back Equal Length (Loudest) Exhaust System for BMW M2 F87 Competition
Regular price From £1,932.00 GBPRegular price£2,415.01 GBPSale price From £1,932.00 GBPSale



















