G1P Y90 Reducer – 4in → Dual

Product Overview

This is a G1Pro-engineered reducer Y-pipe designed for high-performance intake and charge pipe applications. The geometry shown features a 4” Hydraflow (Wiggins) inlet transitioning to dual 3” outlets, developed using a 100mm centerline radius and a G3 continuous spline loft to ensure smooth flow, consistent curvature, and professional manufacturing intent.

This part is available as either a finished, metal-printed component or as a production-ready STL package intended for use with open manufacturing services such as Craftcloud or in-house fabrication.

This is not a concept model.
This is a manufacturing-grade engineering asset.

Key Features

• 4” Hydraflow (Wiggins) inlet connection

• Dual 3” outlet configuration

• 90° Y-pipe geometry

• 100mm centerline radius (CLR)

• G3 spline loft for smooth flow transition

• Designed with real fabrication tolerances

• Suitable for high-boost and motorsport applications

Available Formats

Finished Physical Part

Manufactured and quality-checked by G1Pro.
Ideal for customers who want a ready-to-use solution with no fabrication guesswork.

Available materials and wall options:

• Aluminum (.065” or .080” wall)

• 316 Stainless Steel (.050” or .065” wall)

• Titanium (.050” wall)

Physical parts are branded and manufactured exclusively by G1Pro.

STL File (Customer-Manufactured)

A production-ready STL package intended for use with open-source fabrication services (such as Craftcloud) or your preferred manufacturer.

Each STL download includes a ZIP file containing multiple wall thickness options, allowing the user to select the appropriate configuration during manufacturing.

Included wall thicknesses:

• .050” wall

• .065” wall

• .080” wall

STL files include:

• Manufacturing-ready geometry

• Proper wall thickness variants

• No branding or obstructions

• Designed specifically for metal additive manufacturing

Wall thickness selection is left to the end user based on material choice, power level, and application requirements.

STL License Options

Personal / Self-Use License

For personal builds and internal projects only.
No resale or customer production permitted.

Commercial Shop License

For fabrication shops producing parts for customers.

All STL files are licensed, not sold.
G1Pro retains ownership of all design geometry and intellectual property.

Important Notes

• STL files are delivered digitally and are non-refundable

• Finished parts are produced to order

• Lead times vary based on material selection

• Wall thickness and material suitability are the responsibility of the purchaser

• This product is intended for experienced builders and fabricators