B Series Ramhorn 4-1 Header B16 B18 B20 EG DC EK Honda Acura Civic Integra DC2

B Series Ramhorn 4-1 Header B16 B18 B20 EG DC EK Honda Acura Civic Integra DC2 B-Series Ramhorn (RH) header features a true 4-1 merge collector for more equal exhaust flow & delivers the best peak horsepower gains. 304 brushed stainless steel  True 2.5" inch (ID) collector outlet Hand TIG welded  A/C & P/S compatible (slim fans required)  CNC machined manifold flanges  One year warranty  18 gauge 304 stainless steel  Includes OEM spec header gasket  Includes OEM spec donut gasket  Two piece design with v-band flanges & clamp Recommended for 1.8L-2.0L engine displacements Installation note: Half core radiator must be used.  If you use a full size, the fan will need to be mounted on the other side and/or use a slim fan.  A/C lines will need to be routed for proper clearance.