Velocity Stack Intake Adapter (3in MAF to 4in Filter)

1. Global Coordinates & Datum Structure • Primary Origin (0, 0, 0): Centered on the geometric center of the 76.2 mm inlet opening (MAF housing connection side). • Base Alignment Axis: The main cylinder and velocity stack extend along the Z-axis (positive direction). • Bracket Plane: Parallel to the X-Y Plane, offset by +22.5 mm along the Z-axis from the origin. 2. Main Velocity Stack & Taper Tube • Inlet Connection Profile (MAF Side): • Inner Diameter (ID): 76.2 mm (3.00 inches) • Outer Diameter (OD): 85.2 mm (Assuming a 4.5 mm wall thickness for multi-ply silicone sealing) • Inlet Straight Collar Length: 15.0 mm (Constant cylinder for secure hose clamping) • Outlet Connection Profile (Filter Side): • Outer Diameter (OD): 101.6 mm (4.00 inches to match the aftermarket cone filter flange) • Inner Diameter (ID): 92.6 mm (Preserving the 4.5 mm wall structure) • Outlet Straight Collar Length: 15.0 mm (Constant cylinder for air filter clamping) • Transition Section (Loft/Taper): • A linear, smooth concentric taper (loft) bridging the 15.0 mm inlet collar to the 15.0 mm outlet collar. • Total overall length of entire transition tube component along Z-axis: 45.0 mm. 3. Integrated OEM Mounting Bracket • Base Plate Profile: A rectangular prism centered on the main tube with dimensions of 134.5 mm (Width, X-axis) × 25.0 mm (Length, Y-axis) × 6.0 mm (Thickness, Z-axis). • Central Cutout: A through-hole centered at (0, 0) with a diameter of 102.6 mm (provides a 0.5 mm clearance fit around the 101.6 mm outlet tube). • Left Mounting Pin Hole: • Center point position: (-57.25, 0, 22.5) • Diameter: 8.0 mm (Through-hole constraint for factory rubber isolation grommet alignment) • Right Mounting Pin Hole: • Center point position: (+57.25, 0, 22.5) • Diameter: 8.0 mm (Through-hole constraint for factory rubber isolation grommet alignment) • Center-to-Center Spacing Constraint: Exactly 114.5 mm between the left and right mounting pin holes along the X-axis. 4. Auxiliary PCV Breather Port • Port Location: Positioned on the main transition tube wall at Z = 10.0 mm. • Geometric Features: • Outer Diameter (OD): 12.0 mm • Inner Diameter (ID): 9.0 mm (Wall thickness of 1.5 mm) • Length of port protrusion: 20.0 mm extending outward away from the main intake airflow path. • Angular Alignment: Normal to the curved surface of the intake tube wall.

Parameters

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