EZYPak 1-Inch Threaded Exhaust Flange for Predator 301/670 and Honda GX270 GX340 GX390 — CNC 1/4 Inch Steel

Overview

The EZYPAK 1-Inch Threaded Exhaust Flange is a thoughtful addition for custom exhaust projects on select generators and engines. It pairs with Predator 301cc 11hp and 670cc 22hp units, as well as Honda GX270, GX340, and GX390 models. This adaptor is not designed for Duromax engines 16HP or 18HP, so please verify compatibility before purchasing.

Durable construction, precise fit

Each flange is CNC-cut from rugged 1/4 inch steel to resist warping and maintain a dependable seal over time. The outlet is threaded with a 1 inch NPT connection, engineered to align with common exhaust ports for steady, efficient exhaust flow. The center-to-center hole distance is 2 inches, helping you align mounting points with confidence.

• Heavy-duty materials for long service life
• 1 inch NPT threaded outlet for straightforward port matching
• 2 inch center hole spacing enables reliable alignment

Ideal use cases

Designed for generators and other applications where a custom exhaust is needed, this flange supports compact, robust installations. It suits projects where precise fit, solid mounting, and consistent flow matter—without promising guaranteed outcomes.

• Custom exhaust builds for Predator and Honda engines
• Port matching to optimize exhaust routing and flow
• Durable steel construction for challenging environments

Before you buy

Please check the model carefully before purchasing. If you have questions, email us; we typically reply promptly to help confirm compatibility and fit for your setup.