B&W
20K ISR Mounting Rail Kit
20K lbs
Max Trailer Weight
DIY or Pro?
Installation
Availability
Where to Buy
INOP 2019 GM LD/Limited
INOP CarbonPro & Mono-Leaf
About This Product
The B&W RVK2504 is a mounting rail kit for trucks without factory fifth wheel prep. It provides the under-bed brackets and rails needed to install a B&W fifth wheel hitch rated up to 20,000 pounds.
This kit bolts to your truck frame underneath the bed. Once installed, you have industry-standard rails that accept B&W fifth wheel hitches and compatible equipment.
Installation requires working underneath your truck with basic hand tools. The kit includes all necessary brackets, rails, and hardware.
B&W makes these rails in the USA with heavy-duty steel construction.
Compatibility
Fits These Trucks
Chevrolet
| Model | Years | Bed Length | Bed Prep | |
|---|---|---|---|---|
| Silverado 1500 | 2019 - Present | Long Bed | Nothing At All | All options → |
| Silverado 1500 | 2019 - Present | Short Bed | Nothing At All | All options → |
| Silverado 1500 | 2019 - Present | Super Short Bed | Nothing At All | All options → |
GMC
| Model | Years | Bed Length | Bed Prep | |
|---|---|---|---|---|
| Sierra 1500 | 2019 - Present | Long Bed | Nothing At All | All options → |
| Sierra 1500 | 2019 - Present | Short Bed | Nothing At All | All options → |
| Sierra 1500 | 2019 - Present | Super Short Bed | Nothing At All | All options → |
Compare Options
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Got Questions?
Frequently Asked Questions
The 20K ISR Mounting Rail Kit is compatible with Chevrolet, GMC trucks from 2019 to 2026. Use the fitment table above for the complete list of compatible year, model, and bed configurations.
The 20K ISR Mounting Rail Kit is rated for 20,000 lbs gross trailer weight (GTW). Always verify your truck's tow rating before purchasing.
This hitch is considered DIY-friendly — most owners can install it with basic tools.
The 20K ISR Mounting Rail Kit is available from Amazon, B&W directly. Use the "Where to Buy" buttons above for current pricing and availability.