Chrysler 300c 2006-2007 5.7 V8 340bhp remap figures
The Chrysler 300c 5.7 V8 340bhp (2006-2007) is a petrol 5.7L model making 340bhp and 525Nm as standard. After a Stage 1 ECU remap we expect 380bhp and 574Nm - up to 40bhp and 49Nm more than stock.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 340 bhp | 380 bhp | +40 bhp |
| Torque | 525 Nm | 574 Nm | +49 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 340 bhp | 525 Nm | |
| Stage 1Maximum software-only performance | 380 bhp | 574 Nm | +40 bhp +49 Nm |
| Stage 1 EcoPerformance with economy in mind | 370 bhp | 570 Nm | +30 bhp +45 Nm |
| Eco mapEconomy first | 367 bhp | 568 Nm | +27 bhp +43 Nm |
Who is the Stage 1 map for?
- Drivers who want a sharper throttle and a small, honest gain from software alone.
- Owners who would rather keep the car standard in every other way.
- Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.
What this means for your 300c
Naturally aspirated petrol engines have no boost to raise, so gains from software alone are more modest than on a turbocharged car and come from fuelling, ignition and throttle response.
Engine management is by a Motorola NCG5 unit. We read the ECU on your car and compare it with the software listed here before any work starts, so you know what to expect before you commit.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Chrysler 300c 5.7 V8 340bhp?
We expect 380bhp and 574Nm against 340bhp and 525Nm as standard: up to +40bhp and +49Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Chrysler 300c 5.7 V8 340bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 370bhp and 570Nm expected. The Eco map is economy first: 367bhp and 568Nm. Both still sit above the standard 340bhp and 525Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Chrysler 300c figures
Other petrol variants
All petrol 300c variants · 300c 2005-2010 overview · All Chrysler figures