94-98 12V 3 Piece Exhaust Manifold W/ Turbo Studs #PDI346312V Forged from High Molysiliconductile material, the same material used to cast turbo housings, PDI’s manifold works with the turbo housing to cool at similar rates, eliminating warping and cracking to the manifold. Improved air flow allows for higher fuel efficiency and increases horsepower and torque. Each manifold is designed with a ball seal at each joint which allows the metal to expand as the manifold heats up, eliminating any exhaust leaks. Each manifold includes high quality studs for additional strength and reliability, reducing the possibility of breaking turbo bolts during high heat situations.