Remanufactured GM Chevrolet 3.5L 3.9L Pair Cylinder Heads OHV

Remanufactured GM Chevrolet 3.5L 3.9L Casting 523 OHV Cylinder Heads (Pair)

Professional-Grade OEM Replacement Cylinder Heads

Restore your engine’s peak performance with this pair of remanufactured GM 3.5L and 3.9L V6 OHV cylinder heads. Featuring casting number 523, these heads are precision-engineered to provide a reliable, direct-fit solution for a wide range of Buick, Chevrolet, Pontiac, and Saturn vehicles.

🛠️ 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

• Casting Number: 523
• Engine Size: 3.5L / 3.9L V6
• Valve Train: Over Head Valve (OHV)
• Condition: Remanufactured to OEM Specs
• Assembly: Fully Assembled with Valves and Springs
• Quantity: Complete Pair (Two Heads)
• Core Return Required

🚛 Fitment Data

Common Applications:

• Saturn Aura: 2007–2008 Saturn Aura (3.5L)
• Pontiac G6: 2006–2010 Pontiac G6 (3.9L)
• Chevrolet Impala: 2006 Chevrolet Impala (3.5L)
• Chevrolet Impala: 2006–2011 Chevrolet Impala (3.9L)
• Chevrolet Impala: 2007–2010 Chevrolet Impala (3.5L, VIN K 8th digit)
• Chevrolet Impala: 2007–2010 Chevrolet Impala (3.5L, VIN N 8th digit, Front)
• Chevrolet Impala: 2011 Chevrolet Impala (3.5L, VIN K 8th digit)
• Buick Lucerne: 2009–2011 Buick Lucerne (3.9L)
• Chevrolet Malibu: 2006–2010 Chevrolet Malibu (3.5L, VIN K 8th digit, Opt LZE)
• Buick Montana: 2006–2009 Buick Montana (SV6, 3.9L)
• Chevrolet Monte Carlo: 2006–2007 Chevrolet Monte Carlo (3.5L)
• Chevrolet Monte Carlo: 2006–2007 Chevrolet Monte Carlo (3.9L)
• Buick Relay: 2006–2007 Buick Relay (3.9L)
• Chevrolet Terrazza: 2006–2007 Chevrolet Terrazza (3.9L)
• Chevrolet Uplander: 2006–2009 Chevrolet Uplander (3.9L)
• Saturn Vue: 2008–2010 Saturn Vue (3.5L)