Performance Air Intake for Pontiac Grand Prix (2004-2008) 3.8L 5.3L

Unlock Better Airflow for Your Buick 3800 Series III & LS4 V8 Powered Grand Prix

Who It’s For: This kit is built for the Pontiac enthusiast looking to wake up their 2004–2008 Grand Prix, specifically those running the legendary 3800 Series III V6 or the high-output LS4 V8.

The Problem: The factory airbox on the W-Body chassis was designed for silence, not performance. It uses restrictive corrugated rubber hoses and a baffled plastic box that creates massive turbulence. For the 3800 Series III, this means sluggish off-the-line response. For the LS4 V8, which is already prone to high engine bay temperatures in a transverse layout, the stock setup causes significant heat soak and kills top-end power.

The Solution: We engineered this intake system with mandrel-bent T-304 aluminum to provide a smooth, high-velocity path for oxygen. By replacing the restrictive factory components, we allow the 3800 Series III and LS4 engines to pull in cooler, denser air, correcting the factory design flaws and improving overall volumetric efficiency.

Why This is the Ultimate Upgrade

• Consistent Power Gains: Expect a verified increase of 7–10% in horsepower and 6–8% in torque by eliminating the intake vacuum restrictions found in the OEM assembly.
• T-304 Aluminum Construction: Unlike cheap plastic or thin-wall steel, our T-304 aluminum piping dissipates heat faster and will never crack or warp under high engine bay temps.
• True Bolt-On Engineering: This isn’t a "universal" kit that requires trips to the hardware store. It’s a direct-fit system that utilizes existing mounting points for a clean, 60-minute installation.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 2004 Pontiac Grand Prix 3.8L V6
• 2005 Pontiac Grand Prix 3.8L V6
• 2006 Pontiac Grand Prix 3.8L V6
• 2007 Pontiac Grand Prix 3.8L V6
• 2008 Pontiac Grand Prix 3.8L V6
• 2005 Pontiac Grand Prix 5.3L V8 GXP
• 2006 Pontiac Grand Prix 5.3L V8 GXP
• 2007 Pontiac Grand Prix 5.3L V8 GXP
• 2008 Pontiac Grand Prix 5.3L V8 GXP

Interchange Part Numbers:

AIK-PGP0408-BK, 2004, 2005, 2006, 2007, 2008, 3.8, 5.3, L26, L32, LS4

The Performance Promise

Buy with confidence. As tuners ourselves, we know that every degree of intake temperature matters. This kit is designed to provide a deeper induction growl and more consistent power delivery across the entire RPM band. Backed by real automotive expertise and fast shipping to get you back on the road.