---
product_id: 502308609
title: "420cc Predator Engine - 1\" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust"
brand: "generic"
price: "$76.28"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/502308609-420cc-predator-engine-1-threaded-exhaust-flange-compatible-with-predator
store_origin: US
region: United States of America
---

# 2" flange center hollow-to-hollow 1" NPT stainless steel pipe thread CNC-cut 1/4" steel flange 420cc Predator Engine - 1" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust

**Brand:** generic
**Price:** $76.28
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your engine’s breathability with precision and power! ⚙️

## Quick Answers

- **What is this?** 420cc Predator Engine - 1" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust by generic
- **How much does it cost?** $76.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/502308609-420cc-predator-engine-1-threaded-exhaust-flange-compatible-with-predator)

## Best For

- generic enthusiasts

## Why This Product

- Trusted generic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Compatibility:** Fits Predator 301cc, 420cc, 670cc engines plus Honda GX270, GX340, GX390—your go-to exhaust adapter for multiple powerhouses.
- • **Hassle-Free Installation:** Built to factory specs for direct replacement; professional installation recommended to keep your engine running smooth.
- • **Optimized for Custom Exhausts:** Designed for applications needing custom exhaust setups—keep your spark arrestor intact and upgrade with confidence.
- • **Durable Stainless Steel Outlet:** 1" NPT threaded outlet pipe crafted from stainless steel for long-lasting corrosion resistance and secure exhaust flow.
- • **Precision CNC-Cut Steel Flange:** Engineered from heavy 1/4" steel plate to prevent warping and ensure a perfect fit every time.

## Overview

This 1" threaded exhaust flange adapter is CNC-cut from heavy 1/4" steel for durability and precision. Compatible with Predator 301cc, 420cc, 670cc engines and Honda GX270, GX340, GX390 models, it features a stainless steel 1" NPT outlet pipe and a 2" flange center hollow-to-hollow dimension. Designed as a direct replacement part, it supports custom exhaust applications while maintaining spark arrestor functionality. Professional installation is recommended for optimal performance.

## Description

420cc Predator Engine - 1" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust

## Features

- Note: THIS EXHASUST ADAPTOR DOES NOT WORK ON DUR-OM-AX ENGINE 16HP OR 18 HP
- Compatibility: Predator 301cc 11hp 420cc 13hp 670cc 22hp, Hon-da GX270, GX340, GX390, Generators or other applications where a custom exha-ust is needed
- Outlet Pipe is SS NPT 1" pipe thread, Outlet Pipe Size Approximately 1.9 inch. Flange Center Hollow To Hollow Approximately 2 inch (Size see photos for details)
- Installation: Flange is CNC cut from heavy 1/4" steel plate to prevent warping,Strict quality control standards to Build and test. Designed as a direct replacement for your 1" NPT Flange.Made to factory specifications for a hassle-free installation, Professional installation is highly recommended
- Propose: Leave the spark arrestor internal funnel and face plate screen in place before applying this exhaust gasket and adapter. You also have to get longer screws. The screws are M5-0.8 x 16 or M5-0.8 x 20

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product dimensions | 67L x 3.5W centimetres |
| Automotive Fit Type | Universal Fit |
| Manufacturer | NBAUTO |
| UPC | 768472236135 |
| Model | 1" Threaded Exhaust Flange |
| Item model number | OT001132-1 |
| Exterior | Painted |
| Manufacturer part number | NBAUTOOT001132-1 |
| Item Weight | 155 g |

## Product Details

- **Brand:** Generic
- **Material:** Stainless Steel
- **Vehicle service type:** Car
- **Shape:** Round
- **Installation type:** Bolt-On

## Images

![420cc Predator Engine - 1" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust - Image 1](https://m.media-amazon.com/images/I/61CtoH17noL.jpg)
![420cc Predator Engine - 1" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust - Image 2](https://m.media-amazon.com/images/I/61q9N2K4kEL.jpg)
![420cc Predator Engine - 1" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust - Image 3](https://m.media-amazon.com/images/I/61r3Gi75sML.jpg)
![420cc Predator Engine - 1" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust - Image 4](https://m.media-amazon.com/images/I/61uTfAyJpLL.jpg)
![420cc Predator Engine - 1" Threaded Exhaust Flange Compatible With Predator 301 420 340 390 22hp 670 Generator or Other Applications Where a Custom Exhaust - Image 5](https://m.media-amazon.com/images/I/61MwjOGajSL.jpg)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-25*