B Series Megaphone Header 4-1 Collector RF V2 B16 B18 B20 RMF Skid Plate Pipe

RMF Version 2 header features a true 4-1 merge collector, with a megaphone to create equal exhaust flow & delivers the best peak horsepower gains while utilizing a 1-piece design.  304 brushed stainless steel True 2.5 inch collector Megaphone with reverse cone Hand TIG welded A/C and P/S compatible (slim fans required) CNC machined manifold flange One year warranty 18 gauge, 304 stainless steel Includes OEM spec header gasket  Includes OEM spec donut gasket  One piece design Includes skid plate Half core radiator must be used Recommended for 1.8L-2.0L engine displacements Fits all B-Series motor in 94-01 Acura Integra, 99-00 Honda Civic Si DOHC, and Delsol with the DOHC motor except B20 CR-V block unless you have a different oil pan.  *This is a 2.5" Collector, you will need a 2.5" inlet exhaust or a High Flow Cat that accepts this 2.5" Manifold.