Manley 11502-6 Severe Duty Pro Flo Stainless Steel Intake Valves Buick V6 1.710 Head Diameter Set of 6

The Manley 11502-6 Severe Duty Pro Flo intake valves represent the pinnacle of performance valve technology for Buick V6 engines. These high-performance intake valves are engineered specifically for Buick V6 3.8L Turbo Stage 1 and production cast iron head applications, delivering exceptional durability and flow characteristics for both street performance and racing applications.

Premium NK-844 Stainless Steel Construction:

These intake valves are crafted from exclusive NK-844 stainless steel material, which exhibits over four times the ultimate tensile strength of competing intake valve materials at 1000?F. This proprietary alloy ensures superior performance in high-temperature gasoline engines where reliability is critical.

Key Specifications:

• Head diameter: 1.710 inches
• Stem diameter: 11/32 inch (0.3415 inches)
• Overall length: 4.730 inches (stock length)
• Material: NK-844 stainless steel
• Chrome-plated stems for reduced wear
• Hardened valve tips for extended durability
• Sold as a set of 6 valves

Pro Flo Performance Features:

The Severe Duty series features fully machined combustion faces and swirl-polished underhead areas for optimized airflow and combustion efficiency. The undercut "Pro Flo" stem design reduces weight and improves flow characteristics, making these valves ideal for high-RPM performance applications.

Proven Durability:

Manley's Severe Duty valves have undergone rigorous fatigue testing at 40,000 psi and 1400?F, enduring up to 100 million cycles?demonstrating 1000 times better fatigue life than competing products. Under normal operation, valves experience 20,000 to 25,000 lbs of applied stress, but when valve bounce occurs, stress can soar to 40,000 to 60,000 lbs. These valves are engineered to handle extreme conditions with confidence.