The PLM B-Series Tri-Y Big Tube Header is the industry’s most trusted B-Series exhaust header, known for delivering proven low- to mid-range power gains and unmatched durability. Featuring a true step-up long-tube design and precision Tri-Y collectors, this header optimizes exhaust scavenging for maximum horsepower and torque.
Whether you’re running a B18 or B20 engine, this header is a perfect upgrade for street, drag, or track builds — providing real performance gains and a deep, aggressive exhaust tone.
B-Series Tri-Y Big Tube Header | B18 B20 | 304 Stainless Steel Long-Tube Design
⚙️ Key Features
-
Engine Fitment: B16 • B18 • B20 Honda/Acura B-Series engines
-
Vehicle Fitment:
-
1992–2000 Honda Civic EG / EK (B-Series swap)
-
1994–2001 Acura Integra DC2 / DC4
-
-
Material: High-quality 304 stainless steel
-
Design: Long-tube Tri-Y Big Tube for maximum flow
-
Collector: Step-up design for improved torque & mid-range power
-
Construction: Hand TIG-welded & fully assembled by professionals
-
Flange: 3/8" thick CNC-machined manifold flange
-
Tubing: 16–18 gauge stainless piping
-
Configuration: Two-piece slip-fit assembly for easy installation
-
Warranty: 1-Year Manufacturer Warranty
-
Compatibility: Works with A/C when using slim fans and re-routed A/C lines
🏁 Performance Benefits
-
Noticeable low- and mid-range power increase (perfect for street or autocross)
-
Step-up Tri-Y design for smooth exhaust velocity
-
Improved scavenging = better throttle response
-
Race-proven gains when tuned
-
Lightweight, rust-resistant stainless steel construction
-
“Big Tube = Big Power” — more flow, more performance
⚠️ Installation Notes
-
May require A/C line modification or slim fans for clearance
-
Professional installation recommended
-
Not CARB legal – for off-road / race use only
-
