Expected gains of +22 BHP and +22 Nm torque
Get Your Free Quote ↓Considering an ECU remap for your Pontiac Grand Prix 5.3 V8 303hp? A Stage 1 remap can take this 2004 - 2009 petrol engine from 303 BHP to 325 BHP and from 438 Nm to 460 Nm of torque (naturally aspirated). This engine scores 3.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Pontiac Grand Prix can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Pontiac Grand Prix 5.3 V8 303hp is a 5.3L naturally aspirated petrol engine producing 303 BHP and 438 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 325 BHP and 460 Nm — a gain of around 22 BHP (7%) and 22 Nm (5%).
This engine has limited 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.
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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.