PLM Power Driven B-Series SP Header 4-2-1 Tri-Y B18 B20

Back in stock! April 2021 One of the most popular header design in the world, the PLM Power Driven B-Series SP header features a true 3-stepped exhaust header design that delivers the best top end horsepower while maintaining low to mid range gains. Brand New Made of 304 Stainless steel One year warranty Long tube race header Tri-Y collectors True 2.5"" collector CNC machined flanges Flange is .38"" thick 18 gauge 304 stainless steel One piece design Installation Note:  Tested to fit on B18 engines. Because of different block heights and oil pans combinations, the oil pan may need massaging to clear properly.