Chrysler 300c 2006-2010 6.1 SRT-8 425bhp remap figures
Thinking of remapping a Chrysler 300c 6.1 SRT-8 425bhp? The standard car makes 425bhp and 569Nm; with a Stage 1 remap from our Leicester workshop we expect around 470bhp and 629Nm, up to +45bhp and +60Nm.
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 | 425 bhp | 470 bhp | +45 bhp |
| Torque | 569 Nm | 629 Nm | +60 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 425 bhp | 569 Nm | |
| Stage 1Maximum software-only performance | 470 bhp | 629 Nm | +45 bhp +60 Nm |
| Stage 1 EcoPerformance with economy in mind | 459 bhp | 624 Nm | +34 bhp +55 Nm |
| Eco mapEconomy first | 455 bhp | 621 Nm | +30 bhp +52 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
Without a turbocharger the improvement comes from ignition, fuelling and throttle mapping rather than boost, so expect a smaller but still noticeable change in response.
This car is listed with a Motorola NCG5 engine control 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 6.1 SRT-8 425bhp?
We expect 470bhp and 629Nm against 425bhp and 569Nm as standard: up to +45bhp and +60Nm. 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 6.1 SRT-8 425bhp?
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: 459bhp and 624Nm expected. The Eco map is economy first: 455bhp and 621Nm. Both still sit above the standard 425bhp and 569Nm.
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