1997-2003 Pontiac Grand Prix Underhood Performance

The Zex Nitrous System, also called nitrous oxide, NOS, and various other similar terms, contains patented technology and uses bottle pressu ...more >>

Boost the performance and horsepower of your 3.8L V6 Pontiac Grand Prix, Chevrolet Monte Carlo or Chevrolet Impala with the K&N 57-3045 ...more >>

Boost your performance with our true cold air intake by Cold Air Inductions. Our intake system surpasses our competitors with superior q ...more >>

COMP Cams Pro Magnum Hydraulic Lifters are specifically designed to perform at higher engine speeds. When engines are equipped with a hydrau ...more >>

If you've installed our Comp Cams Xtreme Energy Hydraulic Roller Camshaft or if you've installed higher ratio rocker arms, it's recommende ...more >>

Please note: These are no longer being manufactured in aluminum finish, but are black powdercoated instead. The photos above are no longer ...more >>

The Pulley Boys Supercharger Pulley is the highest quality, best engineered aftermarket pulley available. Add more boost and horsepower wit ...more >>

This Pulley Boys Pulley Puller is the highest quality, best engineered aftermarket pulley tool available. Don't be fooled or try to save a ...more >>

When it comes to late model performance parts, nothing beats bolt-on and direct connection components. Especially when they improve performa ...more >>

MSD's 8.5mm diameter Super Conductor Spark Plug wires (also called spark plug cables) are an extremely popular and well-made brand of wire. ...more >>

MSD's 8.5mm diameter Super Conductor Spark Plug wires (also called spark plug cables) are an extremely popular and well-made brand of wire. ...more >>

The Finest High Performance Street and Race Wire or cable Engineered to Work with Today's Sophisticated Ignitions. Taylor's Spiro-Pro outper ...more >>

If you are no longer using factory spark plug cables and the factory heat shields, and you have a supercharged engine or other high-heat pro ...more >>

Finally a solution to manually operate your cooling fans. Great for the track when you need to keep the engine cool while in the staging lan ...more >>

This PowerAid Throttle Body Spacer from AIRAID is designed to improve the low-end torque and horsepower of your engine while helping to cont ...more >>

The Throttle Position Sensor (TPS) Enhancer maintains maximum horsepower by optimizing the throttle signal sent to the PCM. At about 70% thr ...more >>

The Caspers Electronics V-Plus (V+) Volt Booster is designed to increase your entire electrical system voltage by approximately 2.2 volts ab ...more >>

Official GM Transmission Filter and Gasket Kit. Don't skip this step when you are changing your transmission fluid. This will ensure your tr ...more >>

The Battery Tender PLUS is a 1.25 amp battery charger designed to fully charge a battery and maintain it at proper storage voltage without t ...more >>

Constructed with ultra-strong molded pliable rubber flanges that absorb vibration and allow for a secure attachment, the K&N Cone ...more >>

The official GM fuel pump resistor kit is here. Don't replace your fuel pump if you don't need to. Carry this spare with you and never worry ...more >>

A nice finishing touch appearance part that is used on bayonet-type mounts found on the LS1 and 3800 GM engines. Made of billet aluminum, co ...more >>

Replace the coolant overflow tank in your 1997 or 1998 Pontiac Grand Prix 3.8L engine with our 1999-2003 style coolant bottle that relocates ...more >>

High quality vinyl, computer cut to fit perfectly over the raised stripes, letters and numbers embossed on the supercharged engine cover. ...more >>

High quality vinyl, computer cut to fit perfectly over the raised letters and numbers embossed on the non-supercharged engine cover. Th ...more >>

If you have changed your intake system to a K&N cone filter or even a cold air box such as the SLP or K&N, you'll definitely want to ...more >>

Two 4 ounce bottles of GM Supercharger Oil to complete your supercharger oil change. GM recommends you check your supercharger oil every 30 ...more >>

Often overlooked during scheduled maintenance, you should replace your fuel filter according to your owner's manual. The older your vehicle ...more >>

Quickly and easily install your new Air/Fuel (A/F) gauge using this handy pigtail that makes installation literally a plug and play "snap!" ...more >>

Our engine decals are custom cut to fit in the logos on your engine's beauty or valve cover. Available in many colors including carbon fiber ...more >>

About the V-Power. Modern lean-burning, fuel efficient engines create a new set of requirements for spark plugs. NGK Spark Plugs answered ...more >>

From the laws of physics, cooler air is denser than warmer air. Since horsepower increases as the amount of air and fuel burned increases, c ...more >>

K&N offers a six-step maintenance system that's designed to recharge any K&N Filtercharger Air Filter. The kit includes Filtercharge ...more >>

K&N Performance Gold Oil Filters for automotive applications have been constructed from the ground up to satisfy the high performance ...more >>

What is VCM Suite? VCM Suite is not your traditional handheld device or programmer - it is much more powerful. It is a comprehensive tu ...more >>

APPLICATION LIST 1994-1996 BUICK REGAL 3.1L V6 F/I - All 1994-1998 BUICK REGAL 3.8L V6 F/I - All 1994-2001 CHEVROLET LUMINA 3.1 ...more >>

APPLICATION LIST 1999 BUICK CENTURY 3.1L V6 F/I - All 1999-2004 BUICK REGAL 3.8L V6 F/I - All 1999-2003 PONTIAC GRAND PRIX 3.1L ...more >>

The X4 Power Flash arrives pre-loaded with DYNO Proven tune files that INCREASE HORSEPOWER and TORQUE! Programming your vehicle with one of ...more >>