Vibrant Bellmouth Velocity Stack, 4" Inlet O.D. x 7" Bellmouth O.D. - 10953 45 Degree SB019X is an ACT pressure

SB019X is an ACT pressure plate that uses exclusive diaphragm design to increase clamp load

8 or higher and clear zinc coated for longevity

Air Diverting Fins in Endtanks Designed with CFD Analysis

These factory springs also have a service limit

Significant attention was devoted to the packaging of this exhaust

Vibrant Bellmouth Velocity Stack, 4" Inlet O.D. x 7" Bellmouth O.D. - 10953 45 Degree SB019X is an ACT pressureBellmouth OD: 7. 000" Compatible Air Filter: 10961 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.