bing tracking image
  1. Roof Rack
  2. Yakima
  3. Crossbars
  4. 2 Bars
  5. Aero Bars
  6. 33 In Bar Space
Yakima RailBar Crossbars - Raised, Factory Side Rails - Aluminum - Black - Qty 2

Yakima RailBar Crossbars - Raised, Factory Side Rails - Aluminum - Black - Qty 2

Item # Y00447-2
Our Price: $381.96
Roof Rack

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping
Shipping Weight: 10 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Need help with installation?
Locate installers near me
These low-profile, aerodynamic crossbars clamp to your vehicle's raised factory side rails to create the quietest style of roof rack on the market. Lockable aluminum bars provide a from-the-factory look and have built-in slots for accessories. Great Prices for the best roof rack from Yakima. Yakima RailBar Crossbars - Raised, Factory Side Rails - Aluminum - Black - Qty 2 part number Y00447-2 can be ordered online at or call 1-636-306-4830 for expert service.
  • All Info
  • Q & A (0)
  • Videos (2)
  • Photos
  • Why etrailer?

Yakima Roof Rack - Y00447-2

  • Crossbars
  • 2 Bars
  • Aero Bars
  • 33 In Bar Space
  • Yakima
  • Black
  • Locks Not Included
  • Aluminum

These low-profile, aerodynamic crossbars clamp to your vehicle's raised factory side rails to create the quietest style of roof rack on the market. Lockable aluminum bars provide a from-the-factory look and have built-in slots for accessories.


  • Ultra-quiet, super-low-profile roof rack lets you mount carriers and accessories on the roof of your vehicle with elevated, factory side rails
    • No elevated profile - bars are positioned between factory side rails, not on top of them
  • Aerodynamic crossbars are sleek, highly functional and extremely quiet
    • Tapered-wing shape dramatically reduces wind noise and vibration
    • Airfoil-style bars cut down on drag to help maintain your vehicle's fuel efficiency
  • Crossbars accommodate accessories that either mount in the built-in channels or clamp around the bars
    • Simply push down the rubber strip to slide in channel-mount accessories - no trimming required
    • Works with most Yakima universal-mount bike, water, snow and cargo accessories
  • Simple, clamp-on installation
    • Glass-filled plastic, pivoting towers with rubber gaskets attach to factory side rails
    • No additional equipment required
  • Same Key System (SKS) locks (Y07204 - sold separately) let you secure the crossbars to your roof
    • SKS lock cores can be swapped out to make all your Yakima locks keyed alike
  • Aluminum bars are lightweight and corrosion resistant
  • Black powder coat finish is both durable and good looking


  • Crossbar quantity: 2
  • Weight capacity: 165 lbs
  • Minimum crossbar spread: 27"
  • Crossbar dimensions:
    • Front:
      • Overall: 37-3/4" long x 4" wide x 1-1/2" tall
      • Usable: 26-1/2" - 30-1/4"
    • Rear:
      • Overall: 37-3/4" long x 4" wide x 1-1/2" tall
      • Usable: 26-1/2" - 30-1/4"
  • Limited lifetime warranty

Yakima RailBar

This premium rack mounts between your raised, factory side rails for a from-the-factory look. While most other aftermarket racks mount on top of the side rails with the bars positioned above the mount - creating a high profile - the Yakima RailBar system positions the bars between the side rails for an ultra-low profile.

Aerodynamic Airfoil Design

Yakima RailBar airfoil shape

Designed with the aerodynamic shape of an owl wing in mind, the RailBar produces less drag - and therefore less noise - than any other roof-rack style on the market. But don't let the elegant appearance and clean lines fool you - this roof rack is also sturdy and hard working so you can carry loads of gear. This means your vehicle will still look great inside and out.

Yakima RailBar airflow diagram

The RailBar features sleek, airfoil-style crossbars that are shaped like tapered wings. These lightweight aluminum bars have been shown to reduce drag by up to 70 percent when compared with round and square bars. They do this by putting the air back together quickly after it passes over and under the crossbars. This practically eliminates the buzzing and humming associated with standard roof racks - no fairing required. Because these bars produce less drag, the gas mileage of your vehicle will be far less affected than it is with other roof racks. And because they're constructed of corrosion-resistant, lightweight aluminum, you never have to worry about them rusting or affecting the load-carrying capacity of your roof.

Built-in Channels with Push-Down Access

Yakima RailBar built-in channel with rubber strip

The built-in channels include a soft rubber strips that can be pushed down into the channels when you mount accessories, so you don't have to cut or trim them as you would with other slotted crossbars. And this means you'll likely never have to buy replacement strips.

Hassle-Free Installation

Yakima RailBar adjustment screw tightened

All you need for installation is the included hex wrenches, which store inside the towers. To mount the rack, simply remove the covers from the towers, slide the crossbars in and out of the towers as needed until they are centered on your roof, and then tighten the adjustment screws with the hex keys. Replace the leg covers and the rack is ready to roll.

Yakima RailBar pivoting leg

The mounting clamps - or towers - of the crossbars are constructed of glass-filled plastic that is strong, rigid, and UV and impact resistant. These clamps pivot slightly to accommodate the taper of your roof. Each clamp is also lined with soft rubber pads to prevent scratches and abrasions on your side rails.

Same Key System Locks

SKS Lock Cores

The crossbars are compatible with Yakima SKS lock cores (Y07204 - sold separately) that allow you to secure the rack to your factory side rails. These locks can help prevent theft of the crossbars by ensuring that they cannot be detached from your vehicle. And the locks keep your channel-mounted carriers and accessories safe by denying would-be thieves access to the built-in top slots. The SKS locks are all keyed alike so a single key opens all the locks. The locks can also be swapped out to make all of your Yakima products keyed alike.

Y00447 Yakima Rail Bar Cross Bar - Raised, Factory Side Rails - Aluminum - Black - 31" Long - Qty 2

Replaces 8050403

Installation Details Y00447-2 Installation instructions

This Product Fits The Following Vehicles

Video of Yakima RailBar Crossbars - Raised, Factory Side Rails - Aluminum - Black - Qty 2

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Yakima RailBar Crossbars Review

Speaker 1: Today, we'll be taking a look at and showing you how to install the Yakima Railbar Crossbars. These are going to come in silver and black and many different sizes ranging from 28-3/4 inches all the way to 40-1/2 inches. You can use our fit guide through to find out the best fit for your vehicle. The Yakima Railbars are a great solution for carrying your vehicle accessories on your roof whether those are bike racks, ski and snowboard carriers, or cargo baskets. This is going to be an aerodynamic low profile design, which is going to help to reduce wind noise and drag, and the weather strip on the inside can easily be pushed down, and we can use channel mounted accessories. The railbars are going to work with most Yakima roof rack accessories whether those are clamp on or channel mounted.Our towers are going to be made out of a glass-filled plastic, which will grip around our raised rails using a rubber gasket on top and the metal rubber coated clamp on bottom.

On each of our towers, we're going to have a plastic lock core here. That can be removed and replaced with a metal same key system lock core, part number Y07204, and that's going to allow you to secure your crossbars to your roof. The crossbars themselves are going to be made out of a lightweight aluminum, so they're corrosion resistant. They're either going to come in a satin chrome finish or a black powder coat finish. The Yakima railbars are going to come with a limited lifetime warranty and have a 165 pound weight capacity.

You do want to double check your vehicle's owner's manual to make sure your roof can withstand that much weight. Now that we've gone over some features, we're going to show you how to get this installed.Now to begin our install, we've gone ahead and removed our covers on our bars. We're going to have to extend out this end of our bar, and we can take off our tool. When we place this onto our vehicle, we want to make sure that the thicker end of our bar is facing towards the front. We need to loosen up our clamp just a bit more by using our included tool and loosening up our bolt here.

Then, we'll pull on the end, so that our clamp sits underneath our raised rail and the rubber portion is flesh against the rail on top. We can start to tighten everything down. Want to tighten this down just enough so that our bar stays in place, but we're still able to move it back and forth and adjust our crossbar spread.Now, we'll measure out our crossbar spread. I'm going to measure from center to center. I want this just to be even on each side.

Now, we'll go back taking our tool and tightening down our bolt, so that our crossbar is completely secure on our raised rails.Now, we'll take our cover. We want to line up this tab here with our weather channel. We'll push our end cap in until it locks into place, and now we're ready to load up our accessories.That's going to be our completed look at the Yakima Railbar Crossbars.


See what our Experts say about this Yakima Roof Rack

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate roof rack information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Andrew K
Video by:
Andrew K
Employee Jacob T
Video Edited:
Jacob T
Employee Cole B
Installed by:
Cole B
Employee Savanna B
Installed by:
Savanna B
Employee Daron K
Edited by:
Daron K
Employee Jonathan S
Written by:
Jonathan S
Employee Alex H
Updated by:
Alex H

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-636-306-4830