Brothers Trucks Tri-Y Headers Silver Ceramic Big Block w/ Dual Air Fittings Chevy/ GMC Truck 73-91

Improve exhaust flow and enhance the performance of your Big Block truck with these Brothers Trucks Tri-Y headers for 1973-1991 Chevy/GMC trucks with dual air fittings. Designed to outflow restrictive stock exhaust manifolds, the one-piece 4-2-1 Tri-Y configuration emphasizes low- and mid-range torque while providing ample horsepower throughout the RPM range. This torque-focused design is particularly beneficial for towing and climbing steep grades.

Features and Benefits:
- Designed for Big Block engines
- Designed for applications with dual air fittings
- One-piece Tri-Y header design
- 4-2-1 tube configuration
- Designed to outflow stock exhaust manifolds
- Emphasizes low- and mid-range torque
- Provides ample horsepower throughout the RPM range
- Strong mid-range performance is ideal for towing
- Increased mid-range power is beneficial on steep grades
- Constructed from 14-gauge mild steel
- Features 3/8" thick flanges
- Features 5/16" collector rings
- O-ring welded into the flange helps prevent exhaust leaks
- Includes a high-temperature gasket for additional sealing
- Silver ceramic-coated finish
- Designed around the factory vehicle configuration
- Durable performance-oriented construction

Built for lasting performance, these headers feature durable 14-gauge mild steel construction with 3/8" thick flanges and 5/16" collector rings, all protected by a silver ceramic-coated finish. An O-ring is welded into the flange to help prevent leaks, while the included high-temperature gasket provides an additional seal. The headers are designed around the vehicle's factory configuration, including the original-style cylinder heads, chassis, steering, motor mounts, body mounts, and bushings.

Vehicle Fitment:
- 1973-1991 Chevy/GMC truck with Big Block and dual air fittings