Coyote 2½″ Step-Up Adapter (03-2321)

Overview

The Coyote 03-2321 Step-Up Adapter helps technicians bridge mismatched hose diameters quickly and cleanly.
Because it increases the duct size to 2½ inches, it supports greater airflow and easier hose routing in compact spaces.
This simple adapter ensures a tight, professional connection without the need for extra fittings or clamps.

Function and Performance

This step-up adapter joins smaller louver outlets or evaporator ports to larger hose runs.
Its smooth internal taper reduces turbulence and prevents leaks while preserving air velocity.
As a result, airflow remains consistent through the transition.
In addition, the uniform wall thickness gives the part strength and vibration stability, extending service life.

Durability and Design

Coyote molds the 03-2321 from high-strength ABS plastic engineered for heat, UV, and vibration resistance.
The material keeps its shape under load and resists cracking even in harsh duty cycles.
Because it’s lightweight yet rigid, it performs equally well in OEM production lines and field retrofits.

Installation

Installation takes only minutes.
Insert the smaller end into the existing hose or outlet and attach the larger end to the 2½″ ducting.
The stepped geometry creates a natural compression seal that minimizes the need for extra hardware.
Technicians can also secure it with clamps or sealant when permanent mounting is preferred.

Applications

The Coyote 03-2321 2½″ Step-Up Adapter is widely used in bus, RV, construction, and ag equipment HVAC systems.
It’s especially useful for transitioning 2″ vents or couplings to 2½″ hoses in tight dashboards, bulkheads, or cab roofs.

Specifications

• Series: Step Adapters

• Part Number: 03-2321

• Size: Steps up to 2½″ (63.5 mm)

• Material: Black ABS plastic

• Type: Stepped transition adapter

• Applications: Bus, RV, truck, off-road, industrial HVAC

• Features: Smooth airflow, tight fit, easy installation, durable construction