CALL 215-766-1611 FOR PRICING AND AVAILABILTY (PRICES SUBJECT TO CHANGE) The Champion GN1 Aluminum Cylinder Heads represent the ultimate competition-ready upgrade for the Buick 3.8L Turbo V6 engine. Precision engineered to drop significant front-end weight and maximize airflow, these heads are a direct bolt-on solution for unleashing massive power from street-strip restorations or dedicated drag cars.
Manufactured from high-grade 356-T6 Aluminum Alloy, each head undergoes advanced CNC machining using custom-built fixtures. This single-setup machining process ensures absolute placement accuracy for all valvetrain and port locations. The advanced architecture repositions the spark plugs and large stainless steel valves closer to the cylinder bore center, optimizing combustion efficiency and drastically reducing valve shrouding. Whether running an original factory setup or a maximum-effort racing block, the GN1 series delivers cooler, denser air delivery to support your performance goals. Key Specifications & Features
Premium Material: Cast from lightweight, ultra-durable 356-T6 Aluminum Alloy to handle high boost pressures.
Optimized Combustion: Features 46cc CNC-machined combustion chambers for perfectly consistent volume across all cylinders.
Oversized Valves: Equipped with heavy-duty 1.900" intake and 1.600" exhaust stainless steel valves to dramatically improve engine breathing.
High-Flow Ports: Built with high-flow "as-cast" runners that are factory CNC-contoured for maximum baseline velocity.
Upgraded Valvetrain Components: Includes a premium roller valve spring upgrade kit right out of the box to prevent valve float at high RPMs.
Robust Machining Details: Built with radii on head bolt spot faces to eliminate stress cracks, alongside precision thread-milled spark plug ports.
Component Compatibility: Fully accepts stock rocker arms and factory valve covers for a straightforward installation.Fitment & Application
Vehicle Fitment: Explicitly designed for the 1986–1987 Buick Grand National, T-Type, Turbo T, and GNX equipped with the 3.8L Turbo V6.
Block Compatibility: Universally accommodates both factory Stage I and heavy-duty aftermarket Stage II engine blocks.
Rocker Arm Flexibility: Engineered to support three distinct rocker arm configurations to match your specific camshaft setup.
What's Included
Complete Assembled Unit: Fully built, ready-to-bolt-on cylinder heads featuring pre-installed stainless steel valves, bronze valve guides, and a high-performance roller valve spring upgrade kit.
Made In USA
