Here’s the list of all our tuning files for Buick Rainier 4.2 V8 279hp. They can up its engine’s performance by a few to several dozen percent.

Buick Rainier 2004 - 2007 4.2 V8 279hp
Engine ECU
Engine Number
LL8
|
Stage 1
Stage 2
|
Original | After Tuning | Difference |
|---|---|---|---|
| Power | 279 | 303 | + 24 |
| Torque | 373Nm | 406Nm | + 33 |
| Price | 130,00 € | ||
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