Powerbrake X-Line 4×4 Lexus GX460 Big Brake Kit 2010-2023

Description

Powerbrake X-Line 4×4 Lexus GX460 big brake kits are engineered from the ground up to be the ultimate brake upgrades available on the world market for 4×4 vehicles. These Lexus GX460 big brake kits deliver significantly improved brake performance, reduce brake fade and vastly improve pedal feel and modulation. The performance gains achieved when fitting our big brake kits vastly outweigh the benefits that can be achieved by fitting upgraded, standard diameter discs and pads. Our civilian X-Line 4×4 Lexus GX460 big brake kits feature direct technology transfer from our R-Line off-road race brake systems that have been used by works race teams to win multiple FIA Cross Country World Championships as well the infamous Dakar Rally (which is regarded by many to be the most grueling motorsport event on earth).

X-Line 4×4 Lexus GX460 Big Brake Kit Stage 1 Features

Caliper Construction

At Powerbrake, we believe strongly in the benefits of machining our multi-piston calipers from solid billet. All of our championship winning X-Line and R-Line race calipers are machined from high-grade aerospace aluminum billets, and we’ve chosen to manufacture the X-Line 4×4 range from the same material. Machining from billet is admittedly an expensive way to manufacture calipers but it results in a finished product that exhibits exceptional levels of strength and rigidity.

How do we bring our billet X-Line 4×4 calipers to the market at such competitive prices? Through significant investment in state-of-the-art 5-axis CNC production equipment that allows us to machine the calipers with maximum efficiency. The fact that we machine all of our calipers from billet, matched to the FEA enhanced caliper designs themselves, results in calipers with an impressive rigidity to overall size ratio. The slim profile of the calipers reduces un-sprung weight and aids with wheel clearance.

 

Caliper Surface Finish

Our X-Line Lexus GX460 big brake 4×4 calipers are available in two finish options. Either a Red anodize (type-2) or a Dark Grey hard hard anodize (type-3). The anodize dyes used for our Red finish have been carefully selected to offer the maximum UV and temperature resistance to ensure long-term color retention. The Dark Grey hard anodize is our most durable finish and is the finish that we use on all of our R-Line off-road race calipers.

 

Caliper Logos

Our logos and other markings are applied to our calipers using advanced laser technology. This creates visually appealing contrast between the logo and the caliper color. The logos on our X-Line 4×4 calipers will not be damaged by heat, brake fluid or solvents, as is the case with paint in-lay logos used by many of our competitors. Brake calipers operate in a very challenging environment. They are exposed to dirt, carbonized brake pad material, constantly fluctuating temperatures and constantly changing environmental conditions. Powerbrake has focused on ensuring that our X-Line 4×4 brake calipers will remain looking good under the widest possible range of operating conditions.

 

Caliper Cross-Bolts

The high-tensile caliper cross-bolts used in the assembly of our X-Line 4×4 calipers are European sourced and coated with a silver zinc flake coating. This coating offers exceptional corrosion resistance, while having no negative effect on bolt strength at all. The bolt positions of our X-Line 4×4 calipers are the result of extensive FEA analysis and deliver optimum caliper rigidity. The cross-bolts are inserted into the caliper from the inboard side resulting in maximum wheel clearance.

 

Caliper Pistons

Powerbrake X-Line 4×4 calipers all feature stainless steel pistons. Stainless steel is significantly more expensive to manufacture caliper pistons from than the aluminum pistons used by many of our competitors but the benefits are well worth the investment. Stainless steel transfers heat far slower than aluminum. The result is that stainless steel pistons slow the transfer of heat from the brake pads to the calipers seals and brake fluid, hereby reducing the chances of boiling brake fluid and also extending seal life. Our caliper pistons are manufactured by a special grade of stainless steel that is more than twice as strong as regular 304-grade (in terms of yield and ultimate tensile strengths), while maintain the same levels of corrosion resistance.

 

Internal Fluid Crossovers

Our X-Line 4×4 calipers (like their Dakar-spec R-Line counterparts) feature internal fluid crossovers and hidden bleed screws for protection against damage from stone impacts. Every part of the X-Line 4×4 caliper is aimed at maximum usability and durability in tough off-road or 4×4 conditions.

 

Caliper Maximum Temperature Recording (MTR) System

All Powerbrake X-Line 4×4 calipers feature our MTR system. The system provides a permanent record of the maximum operating temperature reached by the caliper. Feedback from our R-Line race customers has been extremely positive with regards to the MTR system over the years. We therefore decided to apply this same technology to our X-Line 4×4 calipers. Customers will really appreciate this feature as it provides valuable data in the support of brake fluid choice etc. The inclusion of a Max Temp Recording system on civilian big brake kit range at no extra charge is unique to Powerbrake on the world market.

 

Caliper Hardware

All other caliper hardware components (including: pad retaining pins, bleed screws and pad abutments) are manufactured from stainless steel to ensure highest levels of corrosion resistance.

 

Discs

The 1-piece discs used in our (Stage-1) X-Line 4×4 Lexus GX460 big brake kits are cast from a proprietary high-carbon cast iron alloy that provides excellent durability and stability under the high thermal loads experienced under fast-street or off-road driving. The discs feature 48 x curved, directional cooling vanes. The design significantly increases cooling vane surface area and air-flow when compared to factory / OEM disc designs, resulting in vastly improved cooling.

The slot pattern chosen for our X-Line 4×4 discs is our well-proven “AT” slot pattern that provides a good balance between functional aspects such as efficient removal of sand, mud and water (when driving in the rain or after river crossings) and practical aspects such as low levels of noise, vibration and harshness (NVH) under braking. The slot pattern also provides good bite and release characteristics.

Every single Powerbrake disc is measured for run-out and disc thickness variation (DTV) using Swiss measuring equipment. When it comes to QC, there is no batch or statistical quality checking of Powerbrake discs. Every single disc is measured. Our machining tolerances are up to three times tighter than the industry norm.

 

Disc Surface Coating

All our X-Line 4×4 disc rings are coated with a proprietary black surface coating. The discs are chemically de-greased before the application of this coating to ensure that no machining fluids or other contaminants that can be absorbed the brake pads and negatively affect brake performance are present on our discs at all. The coating is able to withstand extremely high temperatures and is flexible enough to expand and contract without flaking or peeling off of the disc surface during the constant thermal expansion and contraction cycles experienced by the brake disc.

Our X-Line 4×4 Lexus GX460 big brake discs require no cleaning or preparation using solvents at all. Simply ensure that the car’s hub is clean and fit the discs as they come out of the box. The black coating will be removed by the brake pads in the pad track areas within the first 4-5 brake applications. The un-swept areas of the disc will remain coated. While our disc coating was primarily designed to ensure that there was zero presence of oils and contaminants on our disc surfaces at the time of fitting (and was not in fact designed to provide corrosion protection), practical experience has shown that the non-swept areas of our coated X-Line 4×4 discs will in fact resist the common formation of unsightly surface rust on the non-swept areas of the discs quite well (depending on environmental conditions in your area). This results in a far more visually appealing assembly visible through the car’s wheels.

 

Disc Maximum Temperature Recording (MTR) System

Unique to Powerbrake, all X-Line 4×4 Lexus GX460 big brake discs feature our MTR system that provide a permanent record of the peak operating temperature reached by the discs. This information is extremely valuable when selecting correct pad compounds for your application. The thermal-paint tabs are applied to the outside diameter of all X-Line 4×4 discs (on both the inboard and outboard disc plates).

Each single-change paint color (4-levels: Blue, Green, Orange and Pink) changes to white when a specific temperature is reached, hereby providing a record of the peak operating temperature of the disc. We also add a multi-change paint that can be used with a provided color gradient chart to further refine the results to a more specific temperature. The simple information required to interpret the results recorded by the MTR system on our X-Line 4×4 discs is provided in the instruction manual that accompanies every X-Line 4×4 big brake kit.

 

Caliper Mounting Brackets

X-Line 4×4 caliper mounting brackets are machined from billet aircraft grade aluminum alloy, FEA enhanced for strength and rigidity and (type-3) hard anodized. One detail to note is that we use stainless steel thread inserts for the radial mount bolts that secure our X-Line 4×4 calipers to the caliper mounting brackets. Since our X-Line 4×4 calipers feature a solid caliper re-enforcement bridge, you need to remove the two caliper radial mount bolts in order to change pads. For this reason we use thread insert in our mounting brackets to achieve maximum thread strength and durability. Similar thread inserts are used extensively used in the aerospace industry due to their increased strength over conventional aluminum threads.

Brake Lines

The brake lines included with our X-Line 4×4 big brake kits feature an extruded Teflon inner lining that is highly resistant to the aggressive chemical properties of modern brake fluids, as well as being able to handle far higher temperatures than rubber. The Teflon lining is covered by 32 strands of tightly woven stainless steel braid that acts as the muscle of the hose, providing incredible resistance to expansion under pressure. Our stainless braid is covered with a polymeric outer layer that prevents dirt from getting between the stainless braid and the Teflon inner lining. The end fittings on our hoses are all machined from grade-304 stainless steel as opposed to the plated, mild steel fittings used by many of our competitors. The resulting hose assemblies offer the best possible pedal feel, matched to excellent durability and corrosion resistance.

 

Brake Pads

The Powerbrake X-Line 4×4 calipers are designed around a pad profile which is available in wide range of brake pad compounds from most pad manufacturers worldwide.

To see all options that Exit Offroad offer for brakes, check out the category here

To see all Powerbrake Products, check out that brand here

Read about this history of Powerbrake

Vehicle Suitability:

2010 Lexus GX460
2011 Lexus GX460
2012 Lexus GX460
2013 Lexus GX460
2014 Lexus GX460
2015 Lexus GX460
2016 Lexus GX460
2017 Lexus GX460
2018 Lexus GX460
2019 Lexus GX460
2020 Lexus GX460
2021 Lexus GX460
2022 Lexus GX460
2023 Lexus GX460