Chrysler 300C 5.7 Hemi V8 340hp Remap

Name: Chrysler 300C 5.7 Hemi V8 340hp ECU Remap
Brand: Chrysler

Expected gains of +20 BHP and +20 Nm torque

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BHP+20 hp (6%)

Standard

340 hp

Tuned

360 hp

Torque+20 Nm (4%)

Standard

525 Nm

Tuned

545 Nm

Suitability

Limited (3/10)

Gains Profile

Limited headroom

Headroom

Low

Chrysler 300C 5.7 Hemi V8 340hp ECU Remapping

Considering an ECU remap for your Chrysler 300C 5.7 Hemi V8 340hp? A Stage 1 remap can take this 2004 - 2011 petrol engine from 340 BHP to 360 BHP and from 525 Nm to 545 Nm of torque (naturally aspirated). This engine scores 3/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Chrysler 300C can achieve.

How this engine compares

4thof 9 Chrysler 300C engines by power gain
14%of the 9,842 engines we hold gain data for see a smaller power increase
8%of engines with torque data see a smaller torque increase

Comparisons are calculated from our own recorded Stage 1 figures.

Assessment

The Chrysler 300C 5.7 Hemi V8 340hp is a 5.7L naturally aspirated petrol engine producing 340 BHP and 525 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 360 BHP and 545 Nm — a gain of around 20 BHP (6%) and 20 Nm (4%).

This engine has low remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.

Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.

Considerations

!Naturally aspirated engine: gains are usually limited; results vary widely.

!High tuned torque: check transmission torque capacity and service history.

Other 300C 2004 - 2011 Engines

Engine

Technical Specifications

Fuel Type: Petrol
Aspiration: Naturally Aspirated
Displacement: 5.7L
Capacity: 5654 CC
Type: Car
Engine Family: Chrysler 5.7L V8 NA Petrol

ECU & Transmission

Likely ECU Low confidence: Petrol ECU (varies by market/year)
Gearbox Low confidence: Transmission varies by trim and market; check manual/automatic type and torque rating. At this torque level, transmission and driveline servicing history becomes especially important.

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Confirm Your Vehicle

MakeChrysler

Model300C

Generation2004 - 2011

Engine5.7 Hemi V8 340hp

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.

We recommend discussing your specific vehicle with a qualified remap professional before proceeding.

2.7 V6 190hp	190 → 210	+20	258 → 280	+22	Moderate (4/10)
3.0 CRD 211hp	211 → 275	+64	510 → 600	+90	Good (7.5/10)
3.0 CRD 218hp	218 → 275	+57	510 → 600	+90	Good (7.5/10)
3.5 V6 250hp	250 → 270	+20	339 → 360	+21	Moderate (4/10)
SRT8 6.1 Hemi V8 425hp	425 → 445	+20	569 → 590	+21	Limited (3/10)