Blacklist Velocity Stack – 5.5″

Blacklist velocity stack with a smooth bellmouth, a silicone-coupler neck and recessed BL branding.

The stack connects end-to-end with the turbo inlet using a separate silicone coupler and two hose clamps. The neck has a 5.5-inch outside diameter with a retention bead. The 5.5-inch measurement refers to the neck OD, not the flow bore.

Details

• One complete, black 3D-printed velocity stack
• 5.5 in / 139.70 mm neck OD for a nominal 5.5 in ID silicone coupler
• 131.70 mm neck flow bore; 4 mm nominal wall
• 38 mm straight neck; 80 mm overall length
• 215.15 mm bellmouth entry ID; 219.15 mm maximum lip OD
• Recessed BL branding

What is included

One printed stack. Silicone coupler, hose clamps, filter and turbocharger are not included. This listing is for a physical part, not a digital download.

Fitment and validation

Check the actual inlet dimensions and available clearance before ordering. No specific turbocharger fitment is claimed. Images show a CAD render and dimensional drawing, not photographs of a finished part. Dimensions are nominal design dimensions; printed fit must be checked.

This 5.5-inch design has not been physically fit-tested or tested for coupler retention, temperature suitability, airflow or engine-running performance. Verify material suitability and secure installation before use. No horsepower or airflow gains are claimed.