Why the B58 TU HPFP Is the Best Mod for Your Gen 1
If you're looking to squeeze more power out of your Gen 1 engine, swapping in a b58 tu hpfp is probably the first thing your tuner mentioned during your last chat. It's one of those rare modifications that doesn't cost a fortune but completely changes what the car is capable of doing. If you own an early F30 340i, an F32 440i, or even an early G30 540i, you already know the B58 is a beast. But, like any great engine, it has a "weak link" once you start turning up the boost, and that link is almost always the factory high-pressure fuel pump. ...