BMW 340i Turbo Kit (Gen 1 B58)

Plan on 4 to 6 weeks from order to ship. Manifolds are fabricated in house and the hot side of every kit is built to order, which is where the time goes. Fittings are machined in house and most small hardware is stocked, so once your hot parts are done the kit moves quickly.

Our kits fit what they are labeled to fit. If the kit says G8X and you have an M4, it bolts up. What we cannot know is what else is already on your car. If your setup is heavily modified and you genuinely do not know if the kit will clear it, email us with what you are working with and we will figure it out together.

If something is wrong with a part, wrong item, missing hardware, a defect, contact us and we will make it right. What we do not do is walk you through installation. Our parts are meant to be installed by a shop or someone with real experience on these platforms, and if that is not you, consult a shop. It is cheaper than the mistakes.

For standard kits, the most popular choices are the Precision 7275 and 6870, with the 7275 carrying more power potential. The real answer lives with your tuner though. Tell them the numbers you want to hit and ask what they normally run, they will be tuning it, so their experience with a given turbo matters. SAVAGE kits play at a higher level and turbo choice matters even more, so definitely have that conversation with your tuner first. Still stuck either way? Email us with what you are trying to accomplish and we will point you in the right direction.

Nothing, the kits are complete. Everything you need to install is in the box, no chasing extra parts. The one exception is the SAVAGE turn down option, which exits before the factory exhaust, so if you go that route your exhaust comes off. Beyond that the only thing left is the tune, see the tuning question below.

Yes, no exceptions. A turbo kit changes everything the factory calibration assumes about airflow and boost, and running one without a proper tune is how engines die. Get your tuner lined up before the kit arrives, tell them what you are running, and do not make full boost until the calibration is done. Most people are best served by a good local tuner who can put the car on a dyno. If you are striking out on finding one, email us, we may know someone in your area, and remote tuning is an option we can point you toward as well.