PLM B-Series Tri-Y Big Tube Header – B18 / B20

PLM B-Series Tri-Y Big Tube Header – B18 / B20

SKU: PLM-HB20-HEADER

Product Description

The PLM Private Label Mfg. B-Series Tri-Y Big Tube Header is a proven performance upgrade and one of the best-selling B-Series headers on the market for over 15 years. Engineered with a true step-up, long-tube Tri-Y design, this header is built to maximize exhaust flow and deliver strong low- to mid-range horsepower and torque gains, making it ideal for street, track, and performance builds.

Designed specifically for Honda B18 and B20 engines, the Big Tube layout improves exhaust scavenging and throttle response while supporting higher-output naturally aspirated or modified setups. The two-piece slip-fit construction allows for easier installation and optimal fitment, ensuring consistent performance and reliability.

Constructed from high-quality stainless steel with thick CNC-machined flanges and hand TIG-welded joints, this header offers durability, heat resistance, and long service life. When it comes to proven performance and value, the original PLM Big Tube header remains a go-to choice for B-Series enthusiasts.

Key Features

• Long-tube Tri-Y exhaust design for improved power delivery

• Big tube layout for increased exhaust flow and performance

• Designed for Honda B18 and B20 engines

• Stainless steel construction

• Professionally hand TIG-welded and assembled

• Two-piece slip-fit design for improved fitment

• 3/8-inch thick exhaust flange

• 16–18 gauge piping

• One-year limited warranty

Vehicle Compatibility

• Honda B-Series Engines: B16, B18, B20

• 1992–2000 Honda Civic (EG / EK) with B-Series swap

• 1994–2001 Acura Integra (DC2) with B-Series

Installation Notes

• Designed primarily for B18 and B20 engines

• A/C compatibility requires slim radiator fans and A/C line re-routing

• Not compatible with A/C in factory stock configuration

• Professional installation recommended for best results