3.8L GM Cast Iron Supercharged Cylinder Heads

GM 3.8L 3800 Series II/III Supercharged Cylinder Head Pair

Optimize Airflow and Boost Performance for High-Output Supercharged Builds

Restore your engine’s peak volumetric efficiency and boost-ready performance with this professionally matched pair of remanufactured cast iron cylinder heads, specifically engineered for the GM 3.8L (3800) Supercharged V6 engine series. Designed to handle the increased thermal loads and cylinder pressures inherent to forced induction, these heads are precision-machined to meet or exceed original equipment (OE) dimensional tolerances, ensuring a superior head gasket seal and synchronized performance across both cylinder banks.

Each cylinder head undergoes a rigorous multi-stage remanufacturing protocol—including ultrasonic cleaning, precision deck resurfacing, and high-pressure leak testing—to eliminate common failure points such as micro-cracking or thermal warpage. This specialized Supercharged variant features durable cast iron construction, providing the structural integrity required to withstand high-boost environments and elevated operating temperatures. Whether you are performing a top-end overhaul on a Buick Regal GS, Pontiac Grand Prix GTP, or Chevrolet Impala SS, this matched set provides the optimal combustion chamber geometry needed to regain factory horsepower and crisp throttle response.

🛠️ In-House Machining Process

• Cleaning: Fully disassembled and thermally cleaned.
• Soda Blasted: Castings are blasted with Sodium Bicarbonate. Because baking soda is water-soluble, there is zero risk of abrasive media clogging oil passages.
• Pressure Testing: Tested to 60 PSI to ensure no cracks or porosity leaks.
• Surfacing: All heads are resurfaced on our Rottler S85A for a precision gasket-sealing surface.
• Valve Job: Multi-angle valve job performed; every port is Vacuum Tested to ensure valves are seated 100% airtight.

📊 Technical Specifications

• Engine Type: GM 3.8L V6 (3800 Series Supercharged)
• Material: Heavy-Duty Cast Iron
• Performance: Enhanced airflow for high-boost applications
• Condition: Remanufactured – Fully Tested & Inspected
• Each Cylinder Head Includes: Valves and Springs Installed

🚛 Fitment Data

Common Applications:

• Pontiac Grand Prix: 1996–2007 (3.8L SC)
• Buick Regal / Riviera: 1996–2004 (3.8L SC)
• Chevy Impala / Monte Carlo: 2004–2005 (3.8L SC)
• Buick Park Avenue Ultra: 1996–2003 (3.8L SC)