Brackets and mounts
Air Intake Velocity Stack
- Bounding box
- 82.5 × 82.5 × 105.3 mm
- Engine
- Precision B-rep
- Parameters
- 19
- Published
- October 8, 2026
Download
Free to download and use. See the terms.
The prompt
Create a parametric 3D CAD model of a blue plastic air intake velocity stack / air horn, based on the following dimensions. Overall height: 105 mm. The part is rotationally symmetric around the Z axis. 1. TOP FLARED INLET - Large circular inlet at the top. - Outer diameter at the top: 82 mm. - Inner diameter at the top: 72 mm. - The inlet has a smooth rounded/flared lip. - Top lip thickness: approximately 5 mm. - The inlet gradually tapers inward from 82 mm outer diameter to a cylindrical body of 58 mm outer diameter. - Flared section height: 35 mm. - Use a smooth curved transition rather than a sharp cone. 2. MAIN BODY - Main cylindrical body outer diameter: 58 mm. - Main body extends approximately 45 mm below the flared inlet. - Wall thickness: 3 mm. - Hollow interior with a continuous air passage. 3. SIDE AIR WINDOWS - Create 8 evenly spaced rectangular ventilation windows around the circumference. - Windows are arranged at 45 degree angular intervals. - Each window is approximately 15 mm wide tangentially and 18 mm high vertically. - Windows are located approximately 35–55 mm below the top lip. - Rounded corners on the windows, radius approximately 2 mm. - Windows must cut completely through the cylindrical wall so that the inside is visible. - Keep vertical structural ribs between adjacent windows. 4. LOWER NECK - Below the window section, transition into a smaller cylindrical neck. - Lower neck outer diameter: 32 mm. - Lower neck inner diameter: 26 mm. - Neck length: 25 mm. - Add a smooth transition from the 58 mm body to the 32 mm lower neck. 5. CLAMP GROOVE - Add a shallow circular groove near the bottom of the 32 mm neck. - Groove width: 8 mm. - Groove depth: 1.5 mm. - The groove is intended for a hose clamp. 6. EDGE DETAILS - Add 2 mm fillets to the outer top lip. - Add 1 mm fillets/chamfers to sharp lower edges. - Keep the entire part hollow. - No internal obstruction in the airflow passage. 7. DESIGN INTENT - The final shape should visually resemble a compact motorcycle/small-engine plastic air intake velocity stack. - The top is wide and funnel-shaped. - The middle has 8 large rectangular openings separated by ribs. - The bottom is a smaller cylindrical hose connection. - Make the model fully editable and parametric. - Use millimeters. - Exportable as STEP and STL.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall Height | 105 mm | 50 – 200 |
| Flare Height | 35 mm | 10 – 80 |
| Neck Length | 25 mm | 10 – 60 |
| Body-to-Neck Transition Height | 10 mm | 2 – 30 |
| Top Outer Diameter | 82 mm | 40 – 150 |
| Top Inner Diameter | 72 mm | 30 – 140 |
| Main Body Outer Diameter | 58 mm | 30 – 100 |
| Wall Thickness | 3 mm | 1 – 8 |
| Window Count | 8 pcs | 2 – 16 |
| Window Width | 15 mm | 5 – 40 |
| Window Height | 18 mm | 5 – 50 |
| Window Top Offset (below top lip) | 35 mm | 5 – 80 |
| Window Corner Radius | 2 mm | 0.5 – 8 |
| Lower Neck Outer Diameter | 32 mm | 15 – 60 |
| Clamp Groove Width | 8 mm | 2 – 20 |
| Clamp Groove Depth | 1.5 mm | 0.5 – 5 |
| Clamp Groove Center Height | 10 mm | 2 – 40 |
| Top Lip Fillet Radius | 2 mm | 0.5 – 5 |
| Lower Edge Fillet Radius | 1 mm | 0.5 – 3 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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