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Buick Rainier 5.3 V8 304hp

2004 - 2007

304 Original HP
321 Modified HP
447 Original NM
471 Modified NM
Print Certificate
Buick Rainier

Buick Rainier 2004 - 2007 5.3 V8 304hp

Key Specifications

Generazione 2004 - 2007
Carburante Petrol
Power 304 → 321 hp +17 hp
Torque 447 → 471 Nm +24 Nm
Power
321 HP
+17 HP (+5.6%)
Original 304 HP
Stage 1 321 HP
Torque
471 NM
+24 NM (+5.4%)
Original 447 NM
Stage 1 471 NM

Power Graph

Original Power 304HP
Original Torque 447Nm
Power After Remap 321HP
Torque After Remap 471Nm

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Frequently Asked Questions - Buick Rainier

The cost of Stage 1 tuning for Buick Rainier 5.3 V8 304hp varies depending on the ECU and specific requirements. Contact us for a free personalized quote.

Stage 1 tuning for Buick Rainier typically takes 1-2 hours of work. Time may vary depending on the ECU type.

Yes, our Stage 1 tunes are developed respecting the engine's safety margins. The power increase from 304 to 321 HP (+6%) is within safe parameters.

With Stage 1 tuning, Buick Rainier goes from 304 HP to 321 HP (+17 HP) and from 447 Nm to 471 Nm (+24 Nm).

Stage 1 remapping takes it from 304 HP to 321 HP (+17 HP, +6%) and torque from 447 Nm to 471 Nm (+24 Nm). These figures refer to the standard engine, with no hardware modifications.

A remap changes the factory calibration, so on a vehicle still under manufacturer warranty it may affect coverage on powertrain components. Performance tuning keeps all emission systems working; deactivating emission devices such as DPF, EGR or AdBlue is not road-legal in the EU and UK and is intended for off-road, motorsport or export use only.

With a normal driving style consumption usually stays the same or drops slightly: the extra torque at low rpm means less throttle for the same speed. Consumption goes up only if you actually use the additional power.

Yes. The original file is read and stored before any modification, so the vehicle can be returned to the factory calibration at any time.

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Buick
Buick Rainier 5.3 V8 304hp
+17 HP
321 HP