Size:
• Neck Side: 4"/101.6mm OD (This is the connection side. Use with 4" coupler for connecting to pipe, tube or turbo)
• Bellmouth Side: 7"/177.8mm OD
• Neck Side: 4"/101.6mm OD (This is the connection side. Use with 4" coupler for connecting to pipe, tube or turbo)
• Bellmouth Side: 7"/177.8mm OD
Vibrant Performance Bellmouth-style Velocity Stacks allow for less turbulent air to enter your intake, resulting in air flow improvements and, ultimately, torque and horsepower gains. They are spun from 1/8" (3mm) thick 6061 Aluminum Alloy.