BMW B58 Stage 1 Upgrade for BMW M140i, M240i, 340i & 440i with the B58 engine.
- Custom Billet Compressor wheel
- CNC Machined
- High Speed VSR Balanced
- 481.18 whp and 437.84 ft/lbs + with supporting mods, see below
On stock car other than an air filter and 93 octane we gained over 30whp and 20ft/lbs with no tune.
On same stock car with only an air filter, JB4, and 93 octane / meth we made 481.18whp and 437.84 ft/lbs
This is a trade-in listing, which requires you to send us your stock B58 turbo to be upgraded.
Please Note: You will need to send in only your core turbo to be upgraded. (Any additional parts that you send may not be returned if sent together with the core)