Seller notes

1320 Performance XL Bellmouth Velocity Stack 4" Inlet 10" Bellmouth. (come with blue silicone coupler) This is the true Drag racing Velocity Stack not the baby 5-6 inch stack that every one else is selling new high efficiency Bellmouth-style Velocity Stacks are ideal for All Motor and Forced Induction race applications. They allow for less turbulent air to enter your motor, resulting in dramatical airflow improvements and ultimately significant horsepower and torque improvements.Also helps reduc...

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