Manley Big Block Chevy 2.350in Diameter 0.350in Longer Length Extreme Duty Exhaust Valves - Set of 8 SPECIAL-ORDER 2006-2012 Porsche 911 (997) without

2006-2012 Porsche 911 (997) without PASM Carrera 4/4S

they have achieved a cooling effect of approximately 5 degrees C or more at the minimum intake air temperature and approximately 15 degrees C or more at the maximum intake air temperature under full normal conditions

Brembo 14-20 F-Type S (Excl RWD) Fr GTS BBK 6Pist Cast 405x34 2pc Rotor Slotted Type1-Black HA

Manufacturer Part # : ACR-2899

Manley Big Block Chevy 2.350in Diameter 0.350in Longer Length Extreme Duty Exhaust Valves - Set of 8 SPECIAL-ORDER 2006-2012 Porsche 911 (997) withoutManufacturer Part # : 11880 8 Market Description Manley Severe Duty Valves deliver the ultimate in strength, reliability, and high performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH 428 for exhaust and NK 844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400F, Manley exhaust valves endured 100 million