4-1 Unequal Length Exhaust Manifold

The Tomei Expreme Unequal Length Exhaust Manifold is engineered to enhance torque and response for the FA20 boxer engine found in the Scion FR-S and Subaru BRZ. This 4-1 design utilizes an unequal length layout to optimize exhaust flow and improve performance characteristics. Constructed from durable SUS304 stainless steel, the manifold boasts a catless design for improved exhaust efficiency and is specifically designed to minimize heat transfer to the oil pan, a common concern with performance exhaust components. The kit includes the exhaust manifold, engine side gasket, joint pipe side gasket, flange bolts, flange nuts, a titan exhaust bandage, bandage bands, and bolt smooth paste, ensuring all necessary hardware for installation is provided. The material is SUS304 stainless steel, with a pipe diameter of 42.7mm and a main pipe thickness of 1.5mm. The flange thickness is 12.5mm front and rear, contributing to its robust construction and a weight of 6.85 kg (15.10 lbs). This product is compatible with the Toyota 86, Scion FR-S, and Subaru BRZ models. It is important to note that the joint pipe is sold separately and must be acquired to complete the installation.