BMW B4x Gen 1 Injector Flow Rate Info
| Injector | Flow Rate @ 3600PSI | Flow Rate @ 2900PSI | Factory Rated Pressure | Bosch Part Number | BMW Part Number | Requires Flow Rate Coding On Installation | Requires Custom Tune Calibration | Engine Compatibility |
| B48/B46 EU6 | Est. 950CC | Est. 850CC | 20mPa/2900PSI | 261500541 | 13538625396 | No | No | B4x Gen 1 Only |
BMW B4xTU and B48E Injector Flow Rate Info
| Injector | Flow Rate @ 5000PSI | Factory Rated Pressure | Bosch Part Number | BMW Part Number | Requires Flow Rate Coding On Installation | Requires Custom Tune Calibration | Engine Compatibility |
| B48/B46TU EU6 | Unknown But Higher Than B4x Gen 1 | 35mPa/5000PSI | Null | 13538656548 | No | Only If Swapped With B48E(B48T1)/S58 | B4xTU and B48E |
| B48E(B48T1)/S58 | Unknown But Higher Than B4xTU | 35mPa/5000PSI | Null | 13538671991 | No | Only If Swapped With B48E(B48T1)/S58 | B4xTU and B48E |
BMW B4x Gen 1 Injector Max WHP
| Injector | Max WHP on 93 OCT (98 RON) @2900PSI | Max WHP on 93 OCT (98 RON) @3600PSI | Max WHP on E85 @2900PSI | Max WHP on E85 @3600PSI |
| B48/B46 EU6 |
405 |
450 |
310 |
345 |
BMW B4xTU and B48E Injector Max WHP
| Injector | Max WHP on 93 OCT (98 RON) @5000PSI | Max WHP on E85 @5000PSI |
| B48/B46TU EU6 |
535 |
415 |
| B48E(B48T1)/S58 EU6 |
572 |
435 |