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B Series Bisi Style Header V2 4-1 Merge Collector B18 B20
B Series Bisi Style Header V2 4-1 Merge Collector B18 B20 B Series Bisi Style Header V2 4-1 Merge Collector B18 B20 B Series Bisi Style Header V2 4-1 Merge Collector B18 B20 B Series Bisi Style Header V2 4-1 Merge Collector B18 B20 B Series Bisi Style Header V2 4-1 Merge Collector B18 B20 B Series Bisi Style Header V2 4-1 Merge Collector B18 B20 B Series Bisi Style Header V2 4-1 Merge Collector B18 B20 B Series Bisi Style Header V2 4-1 Merge Collector B18 B20 B Series Bisi Style Header V2 4-1 Merge Collector B18 B20

B Series Bisi Style Header V2 4-1 Merge Collector B18 B20

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*** IMPORTANT NOTE: Order processing can take up to 1-2 business days. Shipping timeframes start after the order processing has been completed. ***

  • B-Series header features a true 4-1 merge collector for more 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.
  • Recommended for 1.8L - 2.0L engine displacements.
  • Made of 304 Brushed Stainless steel
  • True 2.65 (ID)inch collector outlet
  • Hand TIG Welded CNC-ed machined manifold flange
  • One year warranty 18G on the 304 S/S.
  • Measured at .049" to .050" OEM spec header gasket
  • OEM spec donut gasket 
  • Two piece design Half core radiator must be used

Customer Reviews

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D
David Black
Absolutely amazing!

Bought the bisi style headers for my B16A3 and absolutely blown away by the quality and fitment. Absolutely would recommend and buy again.

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