Ferrea Porsche 996TT 3.6L 33mm 5.95mm 21 Deg Flo +1mm Sgl Radial Grv Comp Plus Exh Valve - Set of 12

These Ferrea Comp Plus exhaust valves are built with a specific material composition and design to handle the demands of a high-performance Porsche 996TT 3.6L engine. The valves feature a 33mm head diameter, which is larger than stock, to help improve exhaust gas flow out of the combustion chamber. This improved flow can contribute to better engine breathing and potentially more power. The valve stems are 5.95mm, a common size for many performance applications, and they have a single radial groove for the keeper. The 21-degree seat angle is also a key design element that works with the cylinder head to ensure a good seal.

Ferrea uses a special alloy for their Comp Plus valves, known for its strength and resistance to high temperatures and pressures found in performance engines. This material choice is crucial for exhaust valves, as they operate in a very harsh environment. The '+1mm' in the product name indicates these valves are 1mm larger in diameter than standard valves, which is a common modification for enthusiasts looking to maximize airflow. This set includes 12 valves, enough for a complete engine rebuild or replacement on your 996TT.

When rebuilding the top end of your Porsche 996TT, using high-quality valves like these Ferrea Comp Plus units is important for reliability and performance. Ensure you have the correct valve spring kit and retainers that are compatible with the 5.95mm stem diameter and the valve head size. Proper installation and valve seat matching are critical for optimal performance and longevity.