Upgrade your in-vehicle setup with this 18-inch Heavy-Duty Seat Rail Mount featuring a universal 4-Hole AMPS mounting pattern. Designed for flexibility, the durable gooseneck bends and positions your device exactly where you need it—perfect for navigation, fleet management, hands-free calls, or in-cab workflows.
Mounted directly to the seat rail or floorboard, this pedestal keeps dashboards and windshields clutter-free while delivering rock-solid stability, even on rough terrain. Compatible with any AMPS-mounted holder or device, this system creates a clean, customizable, and professional mounting solution for cars, trucks, and service vehicles.
Features
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Flexible 18″ gooseneck allows precise positioning for optimal viewing
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Universal 4-hole AMPS mounting pattern compatible with a wide range of holders and devices
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Seat rail or floor installation provides a secure, vibration-free mounting solution
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Keeps dashboards and windshields clear for a cleaner, safer driving environment
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Durable aluminum and metal construction built for heavy-duty commercial use
Compatible with anyholder ordevicethat utilizes a4-hole AMPS mounting pattern.
Works with most* Garmin devices that use the AMPS mounting pattern.
Supported Garmin models include:
- Garmin Overlander
- Garmin Tread Overland
- Garmin Tread Powersport
- Garmin Montana 600 series
- Garmin Montana 700 series
- Garmin GPSMAP 276Cx
- Garmin GPSMAP 66i
- Garmin GPSMAP 66sr
- Garmin zūmo XT
- Garmin aera 500 / 550 / 560
*Please confirm AMPS mounting pattern compatibility with the manufacturer.
- Design: Sleek low-profile design creates a professional in-cab setup without added bulk.
- Model: RM88MAMPSHD
- Mounting Pattern: 4-Hole AMPS
- Total Height: Approx. 21.25 in (539.75 mm)
- Weight: Approx. 1.06 lbs (481.94 g)
- Material: Aluminum
- Mounting Type: Seat Rail

























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