Crushproof FAQ

How long are Crushproof hoses?

Crushproof hoses are manufactured in standard 11-foot lengths. However, the Crushproof ACT hose is available in 20-foot lengths and Crushproof reel hoses are made in 25-foot lengths as standard.

What hose types does Crushproof offer?

Crushproof carries several hose types to cover a wide range of applications:

• Flarelock — The most popular option. Features a male and female end for tool-free connections between sections.
• ACT — Heavy-duty hose for trucks, vans, and diesel equipment. Floor-safe and underground-safe due to wire-helix-free construction.
• ACT Wire Reinforced — Adds a wire helix for maximum crush protection and kink prevention.
• Dyno — High heat-rated hose designed for dynamometer use. Must be used with a fan-assisted system.

View the full exhaust hose lineup or download the hose chart for specs and sizing.

How do Flarelock hoses work?

Crushproof Flarelock hoses have one standard and one flared-out end, allowing multiple pieces to connect to one another without requiring additional parts or tools. A fan is recommended when using hose lengths greater than 10 feet.

What is the Crushproof temperature rating?

Crushproof hoses are designed to handle frequent temperatures up to 400°F and intermittent temperatures up to 600°F.

Is it safe to run a Crushproof system continuously?

No. Crushproof systems must be used with a fan and are designed for intermittent use only — not for extended continuous operation. They should only be used with naturally aspirated 4-cycle engines running at an idle and under no load.

Keep hose runs as short as possible (preferably 11 feet or under) to allow ambient air to help cool exhaust temperatures. When using the system for the first time, watch closely to confirm that exhaust is fully exiting the building. If you see exhaust returning to the space, turn the vehicle off immediately and call our experts.

Vehicle exhaust is extremely dangerous and potentially deadly. We always recommend any system be properly engineered for your specific application.

What size exhaust hose and tailpipe adapter is recommended for my application?

View our exhaust hose chart and adapter application chart for application-specific recommendations, or request a free system design from our specialists.

How do I choose the correct size hose?

Crushproof hoses are sized by I.D. (inner diameter). The hose I.D. should always be at least 1/2" larger than the tailpipe diameter. For example, if tailpipes range from 2"–3.5", select a hose with at least a 4" inner diameter.

What happens if my exhaust hose is smaller than the tailpipe?

If the hose I.D. is not at least 1/2" larger than the tailpipe, you will experience temperature issues that significantly reduce hose life. The friction from high exhaust volume increases temperature and decreases pressure, resulting in various forms of hose damage.

What hoses accept multiple tailpipe adapters?

Most exhaust hoses accept multiple tailpipe adapters, and each adapter fits on multiple hose sizes. View the adapter application chart for all possible combinations.

Are Crushproof hoses available with wire reinforcement?

Yes. We carry ACT Wire Reinforced hoses that provide maximum crush protection and kinking prevention for demanding applications.

When is a Dyno exhaust hose required?

Dyno exhaust hoses are recommended for use with a dynamometer because of their high heat rating. Dyno hoses must be attached to a fan-assisted system to establish a long lifespan.

Do your adapters accommodate all vehicles?

Our tailpipe adapters are designed to fit most vehicles. Keep in mind that a growing number of vehicles have dual or twin exhaust systems, which require Y-connectors or a Y-assembly. View the adapter application chart to confirm the correct adapters for your application, or contact one of our specialists.

How do adapters stay in place?

A hook and chain assembly is attached to each adapter, allowing it to be fixed securely to the frame of the vehicle.

How do adapters attach to exhaust hoses?

Adapters attach to hoses in one of three ways:

1. Screw over the outside of the hose
2. Screw into the threads of the hose
3. The adapter includes a sleeve that screws into or onto the hose, then the adapter fits over or inside the sleeve

What are Y-Connectors used for?

Y-Connectors join hoses together to properly service dual exhaust vehicles. They are sold individually in 2", 2½", 3", and 4" sizes, or as a component of Y-Assemblies that include hoses and adapters. Note: a fan is required when using a Y-assembly system.

What are Splice Connectors used for?

Splice connectors join two sections of hose together when no Flarelock end is available. They come in two types:

• Aluminum — External threads
• Rubber — Internal threads, crushproof construction

Note: The ACT 40-20 hose only works with the AC40 connector and is not compatible with the SP40 connector.

Do you offer complete exhaust removal system kits?

Yes. Crushproof offers several ready-to-use kit options:

• Service Station Starter Kits — Everything needed for a basic exhaust removal setup, sized for the small cars and trucks common to a service bay.
• Y-Assembly Kits — Complete kits for dual exhaust vehicles, including tailpipe adapters, a Y-connector, and hose. A fan is required with these systems.
• Free System Design — For larger or custom facilities, our specialists will design a complete exhaust removal system at no charge. Request a free design here.

How do Garage Exhaust Door Ports work?

Garage exhaust door ports allow a hose to fit inside them during vehicle servicing and are available in 2½", 3", and 4" sizes.

Do you offer larger door ports?

Larger door ports are generally installed as part of a custom exhaust system and are not available as a standard product. Contact our specialists for custom installation guidance.