What is a rev box and what does it do?

A rev box, or rev limiter, controls the maximum engine speed (RPM) your vehicle can reach. This Big Gun Rev Box is designed to increase that limit over the stock unit and also advances the ignition timing curve for potentially improved performance.

Is this a difficult part to install on my Honda TRX 400EX?

This rev box is designed as a direct plug-in replacement for your stock CDI box. This typically means installation is straightforward and doesn't require modifications, but always refer to manufacturer instructions for specific details.

Does this rev box come with a warranty?

Yes, this Big Gun Rev Box comes with a 6-month limited warranty from the manufacturer.

Big Gun Rev Box 40-R22 for Honda TRX 400EX

Name: Big Gun 05-07 Honda TRX 400EX Rev Box
Brand: Big Gun
SKU: big-gun-big-gun-05-07-honda-trx-400ex-rev-box-t14-650959
Price: 201.01 USD
Availability: BackOrder

Big Gun 05-07 Honda TRX 400EX Rev Box

$201.01

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Big Gun 05-07 Honda TRX 400EX Rev Box. Increases RPM limit and advances timing for improved performance.

Key Features

Fits 2005-2007 Honda TRX 400EX.
Increases the overall RPM limit over the stock CDI box.
Features an advanced timing curve for improved engine performance.
Designed as a direct plug-in replacement for the stock CDI box.
Offers an affordable alternative to expensive OEM replacement boxes.

This rev box is designed specifically for the 2005-2007 Honda TRX 400EX. It is not CARB approved and cannot be shipped to California.

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Product Details

The Big Gun Rev Box is a well-built alternative if you're looking to replace your stock CDI box on your 2005-2007 Honda TRX 400EX. This unit is designed to increase the overall RPM limit beyond what the factory unit allows, giving you more flexibility in how you use the engine's power band. It also features an advanced timing curve, which can help improve throttle response and overall engine performance.

Installation is straightforward, as this rev box is a direct plug-in replacement for your original CDI unit, meaning no modifications are typically needed. The advanced timing curve is a notable design choice that helps the engine breathe and perform more efficiently at higher RPMs. While it offers an affordable way to get more out of your TRX 400EX, keep in mind that it is not CARB approved and cannot be shipped to California.

Specifications

Big Gun 05-07 Honda TRX 400EX Rev Box

Key Features

Product Details

Specifications

Frequently Asked Questions