Early models had full access to special Pontiac Grand Prix parts, such as the factory-race Super Duty 421 power-train. The standard engine of the first generation Pontiac Grand Prix was the Bonneville's 303hp 389cuin V8 with four-barrel carburetor and dual exhaust. Today, the Pontiac Grand Prix is offered in 4 trim levels: base, GT, GTP, and the GXP. The base and GT trim house the standard 3.8L V6, while the GTP features a 3.8L V6 with supercharge. For the Pontiac Grand Prix GXP, the engine is the LS4 V8, a 5.3L active fuel management based on the LS1 block. Other features of the GXP included a 4 speed automatic transmissions, heads-up display, vented cross drilled brakes with PBR calipers, and suspension with Bilstein gas-charged struts. To simplify your maintenance, we offer you the largest selections of Pontiac Grand Prix parts: brake pads, timing belts, oil filters, cabin air filters, and more.