B Series Megaphone Header 4-1 Collector RF V2 B16 B18 B20

  • $339.95


*** IMPORTANT NOTE: Order processing can take up to 3 business days. Shipping timeframes start after the order processing has been completed. ***

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

The B Series Megaphone Header 4-1 Collector RF V2 is designed for Honda B Series engines including the B16, B18, and B20. This header features a 4-1 design that merges the exhaust gases from four cylinders into a single collector, resulting in improved exhaust flow and a significant boost in horsepower and torque. The RF V2 version includes a unique megaphone design that enhances exhaust note, giving your engine a distinct, aggressive sound. Made from high-quality materials and expertly crafted, this header is the perfect upgrade for anyone looking to take their B Series engine to the next level of performance.

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

Product Disclaimer:

Emissions Equipment Tampering Warning: In many states, tampering with your vehicle’s emissions equipment is unlawful. Our products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles only and may never be used on a public road or highway.

Using our products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists (more information can be found on the SEMA Action Network website www.semasan.com/emissions for state-by-state details in the USA).

CARB-Restricted Areas: CARB-Restricted products, will not be shipped to state of California under any circumstatences.

Official Air Resource Board Link: ARB State Adoption Link

Customer Responsibility: It is the responsibility of the installer and/or user of this product to ensure compliance with all applicable local and federal laws and regulations. Please check with your local vehicle authority before purchasing, using, or installing any of our products.

By proceeding with the purchase and use of our products, customers affirm their commitment to adhere to the terms outlined in this comprehensive product disclaimer. We reserve the right to update this disclaimer as necessary.


We Also Recommend

😍 Handpicked Recommendations

Bundle Offers from Addly