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The BLOX Racing 4.0‑inch composite velocity stack is a large intake trumpet designed to improve airflow entry for throttle bodies or carburetors with a 4.0‑inch inlet. The composite construction offers a lightweight option for custom intake or individual throttle body systems, helping condition incoming air and simplify intake plumbing where a 4.0‑inch stack is needed for matching hardware and desired airflow characteristics.
BLOX Racing 4.0inch Composite Velocity Stack
