PLM Power Driven V2 B-series "Bisi" header features a true 4-1 merge to create equal exhaust flow. This header delivers the best peak horsepower gains while utilizing a 2 piece design. This is ideal for all forms of competition; Autocross, Drag racing and road racing.

PLM recommends using their 2.75" extension pipe for an easier installation of this header.

Designed for 1.8L-2.0L engine displacement.

Features

• Known as the 'Bisi' 4-1 header
• Made from 18-gauge 304 brushed stainless steel
• True 2.65" inch collector
• Hand TIG welded
• CNC-ed machined manifold flange
• Measure at .049" to .050"
• One year warranty
• OEM spec header gasket
• OEM spec donut gasket
• Two piece design
• Not A/C compatible
• HALF CORE RADIATOR MUST BE USED