BMW M340i G20/G21 Engine & Fuel Upgrades
64 engine & fuel upgrades listed for the BMW M340i G20/G21 (2019+), from Spool Performance, VTT, Dinan and SPL Parts.
Spool Performance
Spool BMW Gen 1 B58 Wireless Ethanol Analyzer Kit
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
$419.00Available
![Spool IFX150 Upgraded DI Injectors [Gen 1 B58]](https://cdn.shopify.com/s/files/1/0734/5084/8395/files/InjectoruploadB58Gen1.jpg?v=1793145541&width=3840)
Spool Performance
Spool IFX150 Upgraded DI Injectors [Gen 1 B58]
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
$1,799.00Available
![Spool Stage 1 IFX350 Upgraded DI Injectors +30% [Gen 2 B58]](https://cdn.shopify.com/s/files/1/0734/5084/8395/files/Gen2injectors-1014x912.jpg?v=1793145540&width=3840)
Spool Performance
Spool Stage 1 IFX350 Upgraded DI Injectors +30% [Gen 2 B58]
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 2 more
$1,599.00Available
![Spool Stage 2 IFX350X Upgraded DI Injectors +60% [Gen 2 B58]](https://cdn.shopify.com/s/files/1/0734/5084/8395/files/Gen2injectors4-1014x912_cf11da97-2764-4f39-9a21-b5bcd1ce422c.jpg?v=1793145524&width=3840)
Spool Performance
Spool Stage 2 IFX350X Upgraded DI Injectors +60% [Gen 2 B58]
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 2 more
$1,999.00Available
Spool Performance
SPOOL B58 G2 / S58 Plug and Play Motiv Reflex Plus Harness
Fits: M2 G87, M3 G80/G81, M4 G82/G83 & 10 more
$149.99Available
Spool Performance
SPOOL B58/S58 Plug and Play Ethanol Sensor Harness
Fits: M2 G87, M3 G80/G81, M4 G82/G83 & 10 more
$24.99Available
Spool Performance
SPOOL B58 Gen 1 Plug and Play Motiv Reflex Plus Harness
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
$149.99Available
Spool Performance
Spool B58/S58 Billet Race Torque Converter Upgrade - No Core Required!
Fits: M2 G87, M3 G80/G81, M4 G82/G83 & 10 more
$2,199.00Available
Spool Performance
Spool Performance ATC-13 Stage 2 Transfer Case DIY Kit
Fits: M3 G80/G81, M4 G82/G83, M5 F90 & 8 more
$1,399.00Available
Spool Performance
Spool B58 G2 / S58 Full Race Ptcan-2 Motiv Reflex Harness
Fits: M2 G87, M3 G80/G81, M4 G82/G83 & 10 more
$299.99Available
Spool Performance
Spool Injector Dynamics IDX1050XDS | B58 S58 Port Injection | Set of 6
Fits: M2 G87, M3 G80/G81, M4 G82/G83 & 10 more
$806.00Available
Spool Performance
SPOOL B58 S58 Steel Heat Shield for Top Mount Turbo Setups
Fits: M2 G87, M3 G80/G81, M4 G82/G83 & 10 more
$59.99Available
![Spool Stage 3 Low Pressure Fuel Pump - [FXX Gen 1 B58]](https://cdn.shopify.com/s/files/1/0734/5084/8395/files/stage_3_gen_1_d759071d-09ac-4d88-b9d6-f305c8dace6c.jpg?v=1793145469&width=3840)
Spool Performance
Spool Stage 3 Low Pressure Fuel Pump - [FXX Gen 1 B58]
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
From$849.00Available
![Spool Stage 3 Low Pressure Fuel Pump - DIY Kit [FXX Gen 1 B58]](https://cdn.shopify.com/s/files/1/0734/5084/8395/files/diy_kit.jpg?v=1793145467&width=3840)
Spool Performance
Spool Stage 3 Low Pressure Fuel Pump - DIY Kit [FXX Gen 1 B58]
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
$449.00Available
![Spool FX-200 Upgraded High Pressure Pump [Gen 1 B58]](https://cdn.shopify.com/s/files/1/0734/5084/8395/files/SpoolFX200-2_900x900_crop_center_636381bf-6fe6-4c2c-88ad-e7f024559f43.webp?v=1793145460&width=3840)
Spool Performance
Spool FX-200 Upgraded High Pressure Pump [Gen 1 B58]
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
From$1,799.00Available
![Spool Stage 3 Low Pressure Fuel Pump - DIY Kit [Gen 2 B58]](https://cdn.shopify.com/s/files/1/0734/5084/8395/files/3_c0567b9f-7e9b-4750-a7eb-f0cf3aef3e68.png?v=1793145451&width=3840)
Spool Performance
Spool Stage 3 Low Pressure Fuel Pump - DIY Kit [Gen 2 B58]
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 2 more
$749.00Available
![Spool FX-350 Upgraded High Pressure Pump [Gen 1 B58]](https://cdn.shopify.com/s/files/1/0734/5084/8395/files/S58_fx350_2.jpg?v=1793145427&width=3840)
Spool Performance
Spool FX-350 Upgraded High Pressure Pump [Gen 1 B58]
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
From$1,999.00Available
Spool Performance
Spool BMW Gen 2 B58 Wireless Ethanol Analyzer Kit
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 2 more
From$449.00Available
Spool Performance
Spool BMW B58 Gen1 Auxiliary Split Fuel System
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
From$1,299.00Available
Spool Performance
Spool BMW B58 Gen2 Auxiliary Split Fuel System
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
From$1,299.00Available
JXB Performance
JXB Performance Driveshaft Carrier for BMW F90/F95/F96/F97/F98/G01/G02/G05/G06/G20/G21/G22/G23/G30/G61/G62/G38 - Street Bushings
Fits: M5 F90, X3 M / X4 M F97/F98, X5 M / X6 M F95/F96 & 3 more
From$299.99Available
P3 Gauges
P3 BMW B48/B58 Boost Tap
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
$100.00Available
Ramair
Ramair Performance Pleated Induction Kit With Carbon Lid for BMW 1/2/3/4 Series 3.0T B58
Fits: M340i G20/G21, M440i G22/G23/G26, M240i G42 & 6 more
$504.99Available
RaceChip
RaceChip Performance Chip Tuning Kit For BMW M340i/Z4 382HP
Fits: M340i G20/G21
From$379.00Available
More for the M340i G20/G21
- M340i G20/G21 coilovers & suspension42
- M340i G20/G21 exhaust systems38
- M340i G20/G21 intakes33
- M340i G20/G21 turbo & boost parts18
- M340i G20/G21 brake pads & rotors16
- M340i G20/G21 intercoolers & manifolds15
- M340i G20/G21 cooling upgrades14
- M340i G20/G21 maintenance parts12
Buying guides
Every part here is listed for the BMW M340i G20/G21. Check the product description for exact years, body style and drivetrain, or call or text 945-954-1142 with your VIN and we'll confirm fitment before it ships. Looking for other cars? See all engine & fuel.