Straight-Piped Pontiac Grand Prix GXP Sounds Like Thunder, Doesn't Shine Like Lightning
29 Nov 2023, 10:49 UTC · By: Cristian Gnaticov / In the GXP spec, the eighth-gen Pontiac Grand Prix came with a 5.3L V8 making over 300 horsepower, joined by a re-tuned chassis and other upgrades