Vibrant Bellmouth Velocity Stack Aluminum (2.5in Neck O.D. 6in Bellmouth O.D.)

Vibrant Bellmouth Velocity Stack Aluminum (2.5in Neck O.D. 6in Bellmouth O.D.)

Marsoni

M251S

$75.47

Get it in 3 business days with 1 day shipping. Friday, May 29

Vibrant Bellmouth Velocity Stack Aluminum (2.5in Neck O.D. 6in Bellmouth O.D.)Vibrant Performance aluminum bellmouth velocity stacks are constructed from spun, 1 8 thick T6061 aluminum and are designed with the turbo fabricator in mind. Vibrant Performance bellmouth velocity stacks are ideal for all motor and forced induction race applications. They allow for less turbulent air to enter your engine and reduces turbo lag which cumulates in dramatic airflow improvements resulting in significant torque and horsepower gains. They

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It's true to size. I have a 42" chest and typically wear a large. I ordered large and it fits. Grab these while you can as most of these mock neck t shirts are a cotton poly blend. These are 98% cotton. This is important because although the cotton/poly blends dry quicker, they are uncomfortably warm if it gets above 70 F. I have purchased other mock turtlenecks and had my local dry cleaners convert them from long sleeves to short, but they are slightly heavier weight than these. I do wish that they made these in a dark green or military green color.

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Reviewed in the United States on March 26, 2026