Big Gun big40-R01 99-04 Honda TRX400EX Rev Box

If you are looking to swap out your stock CDI box, the Big Gun Over Rev Box is an affordable alternative to highly-priced OEM replacement boxes. It increases the overall RPM limit over the stock box and advances the timing curve.

• Easy direct plug in replacement to stock CDI box
• Increases overall RPM limit
• 6 Month Limited Warranty
• Advanced timing curve

The Big Gun big40-R01 Over Rev Box is a direct plug-in replacement for the stock CDI box on select Honda TRX400EX Sportrax models. It provides an alternative to a highly priced OEM replacement while increasing the overall RPM limit and advancing the timing curve.

Key Features & Performance Benefits

• Direct Replacement: Plugs directly into the stock CDI box connection.
• Increased RPM Limit: Raises the overall RPM limit over the stock box.
• Advanced Timing Curve: Advances the timing curve for revised engine operation.
• Warranty Coverage: Includes a 6-month limited warranty.

Product Specifications & Technical Data

• Brand: Big Gun
• Part Number: big40-R01
• Product Type: Powersports rev box
• Application: CDI box replacement
• RPM Performance: Increases the overall RPM limit
• Timing: Advanced timing curve
• Warranty: 6-month limited warranty
• CARB Status: Not CARB approved

What's Included

One Big Gun big40-R01 Over Rev Box.

Fitment

Fits 1999–2004 Honda TRX400EX Sportrax models.

Fitments:
1999 Honda TRX400EX Sportrax Base
2000 Honda TRX400EX Sportrax Base
2001 Honda TRX400EX Sportrax Base
2002 Honda TRX400EX Sportrax Base
2003 Honda TRX400EX Sportrax Base
2004 Honda TRX400EX Sportrax Base

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: Testing
Regular Stock: t
Units Per Sku: 1