GX470 Extreme Clearance Rear Bumper Kit

From: USD$786.25

This is our new extreme clearance DIY weld-together bumper kit for the Lexus GX470 (2003-2009). The installation involves cutting out the bulky rear frame crossmember and tubbing the lower body corners to achieve massive gains in ground clearance and departure angle. This bumper is particularly exciting for us as it's the 2nd release of our new hybrid plate rear bumper series. The center span of this bumper is made from a piece of rectangular tubing that has various slots and tabs cut into all 6 sides using a new 5-axis CNC tube cutter. This makes for easier and stronger fit-ups of the hitch receiver, mounting brackets and surrounding plate pieces. The idea behind this bumper is ultimate simplicity and very quick and easy welding! It features a very minimalist profile, recessed 2" receiver hitch, and one of the best departure angles on the market. This bumper allows you to forget about departure angle and substantially improves the offroad capability of your GX470. It offers excellent protection from trail obstacles and distracted drivers alike and has been kept to a weight of only 112lbs through careful design work.

SKU CO105779 Categories ,


WARNING: This is our Extreme Clearance bumper kit that requires cutting your GX470’s frame and tubbing the lower body corners. Please ensure that you understand the modifications to your vehicle required before purchasing this kit. For our standard low profile GX470 bumper kit that does not require any permanent vehicle modifications, please see here.

While the Lexus GX470 is one of the best offroad platforms going, the rear of the frame and body do pose some big limitations from the factory. At the rear of the vehicle, there is a bulky frame crossmember that hangs down about 7″ below the rear hatch and also protrudes several inches outwards from the rear hatch itself. To go along with this, the rear body corners of the GX470 hang down even lower than the frame. Even though these corners are simply sheetmetal voids with nothing inside of them! These factors give the GX470 (and all 2003+ Toyota SUV’s for that matter!) a much worse departure angle then the Tacomas and older Toyota SUV’s. On those vehicles, a very high clearance bumper can be achieved with little modification to the vehicle.

Our solution is the GX470 Extreme Clearance Rear Bumper you see here. For this bumper, we cut off the low hanging frame crossmember and replace it with our frame end plates. The lower body corners then get trimmed and tubbed using the sheet metal tubbing plates included with this kit. This process is broken down step by step with tons of detailed pictures, which takes all of the guesswork out of this otherwise daunting modification. With this bumper, your GX470 will gain a ton of extra ground clearance, departure angle and rear end protection. With no exaggeration, this bumper will transform the offroad capability of your GX470.

This bumper still uses the factory bolt holes on the frame to mount to the vehicle, meaning that there is absolutely no guess-work required when mounting this bumper or welding in the supplied frame end plates. The factory mounting points will locate the bumper perfectly on the vehicle, and then the supplied frame end plates comes pre-cut with holes for two large 1/2″ bolts per side. This adds up to a bumper that mounts to the bottom, rear, outside and inside walls of your frame using a total of 18 bolts, making for an extremely strong and stiff bumper that will not flex or shift during hard impacts and recovery point pulls. While this many mounting points is totally overkill, this relieves stress from your vehicles frame by distributing those forces over such a large section of frame.

The profile of this bumper has been designed with maximum ground clearance and departure angles put first. The bumper profile is only 2″ tall underneath the rear hatch and the side wings also sit well above the height of the Lexus GX470 (2003-2009) frame. In addition, the recessed hitch receiver and angled lower side wing faces will smoothly slide over obstacles and ensure you do not get hung up on the trail. These features make a very noticeable difference during deep ditch crossing and steep obstacle climbs where other aftermarket bumpers with bulky rear profiles and protruding hitch receivers will hang up and impede your progress on the trail. Simply put, this bumper allows you to forget about departure angle and substantially improves the offroad capability of your GX470!

Unlike many aftermarket bumpers that are more or less empty shells with minimal reinforcement, this bumper contains extensive internal ribbing and mounts directly to factory holes in the bottom and sides of the GX470’s frame for unmatched strength and stiffness. The side wings of this bumper tie directly into the vehicle frame using massive slabs of 1/4″ thick plate steel that we CNC-bend here in house. While this bumper is extremely lightweight overall, we decided to go way overkill on the side wing support braces. This results in side wings that will take serious trail hits without flexing or deflecting into the vehicle body. We know that many Lexus GX owners want to run oversized tires, which often create interference and rubbing issues with the stock bumper. We have thought ahead and specifically designed these bumper side wings to clear 37″ tires at full compression with no trimming required.

The main section of this bumper is formed from a single piece of 3/16″ wall rectangular tubing. This tubing has slots and tabs cut into all 6 of its sides that then lock into all of the surrounding plate pieces. This makes for foolproof fitment of each part as they will only fit together in one possible way. This greatly reduces the amount of welding and grinding time required by you and makes for a cleaner finished product. If you are paying to have the bumper assembled by a welding shop, this significantly lowers the cost!

We finished this bumper off with optional single and dual swing out carriers, a high clearance hitch receiver, LED pod lights to go on top of the bumper or swing outs (sorry, this bumper is way too low profile to fit lights inside of it!), and heavy duty 9/16″ recovery points that are placed directly in line with the Lexus GX470 frame to eliminate any leveraging effects. These recovery points are formed out of laser cut steel plates that pass through the CNC-cut slots in the rectangular tubing center and tie directly into the bumper’s main mounting points on the GX470 frame. The recovery points then get welded to the in and outside of the rectangular tubing center, made possible by our 5-axis CNC tube cutter’s capabilities. These factors all combine to form recovery points that minimize stress on your Lexus GX470’s frame and provide reliable recoveries of heavily loaded vehicles in the worst of offroad situations. What could make this bumper even better? The low profile design has resulted in a very reasonable weight of 112lbs! Considering that this bumper replaces your factory bumper, hitch receiver, rear frame crossmember, lower body corners, and a ton of other small parts and brackets, the resulting weight increase to your Lexus GX470 is surprisingly minimal. In fact, this bumper will actually reduce the weight of your vehicle if it came equipped with the larger weight distribution hitch option! This reduces added stress on your vehicle, maintains precious payload capacity, and allows you to keep your existing coil springs if desired.

The swing out tire carrier comes in either a single or dual sided configuration and is built to accept a tire up to 37″ in diameter! Both carriers include mounting brackets for a hilift jack and other recovery items. The dual swing out includes the hilift mount as well as a lockable jerry can holder designed to fit two 20L NATO style jerry cans. These carriers feature heavy duty chromoly heim joint hinges, 2000lb toggle latches, T-handle spring pins, and a replaceable UHMW catch pad that provides secure, rattle free operation. The heim joints in conjunction with the toggle latch provide tons of adjustability, allowing for easy assembly and guaranteed alignment of the carrier latch. The single swing out add-on weighs 34lbs and the dual swing out add-on with gas can holder weighs 77lbs.

•DIY Weld-together kit – This bumper arrives as precision CNC-laser cut and bent pieces that you then weld together (detailed assembly instructions included)

•Cutting your Vehicle’s Frame and Body are required for the installation of this bumper kit. For our GX470 bumper kit that does not require any permanent vehicle modifications, please see here.

•Hybrid design uses a single piece of slotted and tabbed rectangular tubing for the center span. The production of this piece is only possible on our 5-axis CNC tube cutter. This piece greatly reduces amount of welding and grinding required by you and makes for a cleaner finished product!

• Slim profile is engineered to provide maximum ground clearance and complement the factory body lines – the total height of the bumper is only 2″ underneath the GX470’s rear hatch

• Heavy duty 3/16″ plate steel construction for maximum offroad strength and durability

• Included 2″ hitch receiver is recessed for a clean look and further clearance gains (While the hitch is very well reinforced, we cannot rate it for on-road towing due to the DIY welding nature of this kit)

•Mounts directly to frame using 18 mounting points for unbeatable strength.

•Reinforced 9/16″ thick clevis mounts allow the use of 3/4″ D-Rings and pull directly off of the frame for confident recoveries of heavily loaded vehicles

•Side wing support braces are made from massive 3/8″ thick steel slabs for unbeatable strength

•All kits ship as clean, bare metal that is ready to weld out of the box – the Nitrogen laser cutting technology means no cutting edge oxidation and thus easier and stronger welds

•Optional Single and Dual Swing out carriers with spare tire mount, hilift jack mount and locking dual NATO can holder (dual swing out only)

•Optional LED lights include adjustable mounting tabs to mount the lights either on the swing outs or on top of the bumper

Additional information

Body Lift Adjustment (NOT suspension lift)

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Swing Out Tire Carrier

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Cree LED Lights

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Rear Quarter Protection Hoops


3/4" Recovery Shackle (Pair)


Bumper assembly

As for welding, with everything designed using CAD software and then CNC laser-cut to size, the pieces fit together perfectly and this makes for a very simple assembly process. All kits come with detailed instructions with plenty of clearly labelled diagrams that are made using cutting-edge CAD software. This bumper kit is well within the ability of a novice welder and many customers have purchased it as their very first welding project with great results! This is made possible by the clean parts fit-ups and thick material. These are two factors that make welding significantly easier. Welding is one of those skills that is easier to learn than you may think and once you can do it, you’ll wonder how you ever got by without it. Alternatively, many individuals buy the kits and then have a local welder assemble it for them. Even in this case, it typically ends up being less expensive than buying a pre-fabricated bumper – especially after considering the lower shipping costs of our kits vs. fully assembled bumpers.

Bumper weight

Coastal Offroad bumper weight (including hitch receiver): 112lbs



Forget the outrageous lead times of many bumper options that are measured in months. All of our bumper kits ship within 3-10 business days with 2-day shipping


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Wondering what is involved in assembling and welding this bumper kit?

Watch the video below to see 4th Gen 4Runner Owner Garrett Logan run through the process and gives his thoughts along the way.
(The 4th gen 4runner is shown, but the build process is nearly identical to this bumper).

Wondering what is involved in assembling and welding this bumper kit?

Watch the video below to see 4th Gen 4Runner Owner Garrett Logan run through the process and gives his thoughts along the way.

Don't see exactly what you're after?

We at Coastal Offroad are more than happy to work with our customers to design their dream bumper. Feel free to send us an email (support@coastaloffroad.com) for any custom requests.