COMPATIBLE: (1.6L)

1991 - 1999 NISSAN SENTRA

1991 - 1993 NISSAN NX-1600 

Surface: Mirror Polish Primaries: 1.65" OD Port Shape: Circle Port ID: 1.45" ID Collector: 1.9" OD Outlet: 1.65" OD Main Piping Size: 1.9" OD O2 Bung: 1 EGR: 1 Air Injection: No Flange Thickness: 0.40" 

The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold.