BMW 335i / M340i tune. Nashville.
The N55 (335i, 535i) and B58 (M240i, M340i, Z4) twin-scroll single-turbo straight-six is one of the most tune-responsive platforms BMW makes. Stage 1 alone is good for 70–100 wheel hp on stock cars. The platform was conservatively tuned from the factory — there's real headroom available.
Every Carma tune includes.
Real prices, no dyno-number runaround. Here's what comes with every flash — at no extra charge.
What we do for the 335i / m340i.
Stage 1 unlocks boost, timing, and fueling across the RPM band. We've mapped N55 cars from stock 335i daily drivers to hybrid-turbo Stage 2+ builds. B58 is similar but newer — even more headroom on 93 octane.
- Stock file pulled and archived (free stock-revert anytime)
- Custom-mapped per engine code (N55 and B58 use different programmers)
- Safe map flashed and road-tested in-house
- Flex-fuel and bench-flash support for built engines
- Lifetime support on revisions
Pricing for the bmw 335i / m340i.
No dyno-number games, no hard sell. Drive it, and if the tune isn't for you, we revert to stock at no charge. That's how confident we are in the map.
Common questions.
Will BMW detect the tune?
Same answer as the M3/M4 — BMW logs some boost/ignition events. Free stock-revert before any planned dealer visit.
How much can I make on the stock turbo?
N55 stock turbo: ~400 wheel hp on Stage 2. B58 stock turbo: ~450 wheel hp on Stage 2.
Is bigger turbo the next step?
Yes — hybrid turbo or full upgrade. We've tuned hybrid N55 builds past 500 wheel hp.
How long does the appointment take?
Stage 1: 2 hours. Stage 2 with mods to install: half-day to full day.
Book your BMW 335i / M340i tune.
Drop it off in the morning, drive it home tuned by end of day. 1035 3rd Ave S, Nashville, TN 37210 · Mon–Fri 8 to 5.