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BRX01 AWB "Holy Grail" Custom Builder's Kit

Fits BRX01 AWB
USD $545.00
  1. BRX01 AWB
  2. BRX01 AWB
  3. BRX01 AWB Optional Parts

BRX01 AWB "Holy Grail" Custom Builder's Kit

Fits BRX01 AWB

USD $545.00

Part #: BR8016


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BRX01 AWB "Holy Grail" Custom Builder's Kit

Fits BRX01 AWB

USD $545.00

Part #: BR8016

BRX01 AWB "Holy Grail" Custom Builder's Kit [BR801 BRX01 AWB "Holy Grail" Custom Builder's Kit [BR801
BRX01 Chassis Kit [BR8001] BRX01 Chassis Kit [BR8001]
BRX01 w/ LC70 Body [BR8002] BRX01 w/ LC70 Body [BR8002]
BRX01 AWB Leaf w/ ZIL Body [BR8010] BRX01 AWB Leaf w/ ZIL Body [BR8010]
BRX01 AWB Leaf Builder's Kit [BR8011] BRX01 AWB Leaf Builder's Kit [BR8011]
BRX01 AWB Link w/ ZIL Body [BR8013] BRX01 AWB Link w/ ZIL Body [BR8013]
BRX01 AWB Link Builder's Kit [BR8014] BRX01 AWB Link Builder's Kit [BR8014]
ZIL Pickup Hard Body ZIL Pickup Hard Body
ZIL Pickup Hard Body (Cab Only) ZIL Pickup Hard Body (Cab Only)
BRX01 AWB Custom Crawler Kit [BR8015] BRX01 AWB Custom Crawler Kit [BR8015]
BRX01 AWB "Holy Grail" Custom Builder's Kit [BR801 BRX01 AWB "Holy Grail" Custom Builder's Kit [BR801

Chassis Options

* Wheelbase:

* Suspension Type:

* Front Axle:

* Rear Axle:

* Transfer Case (^ includes additional mini servo and mounts):

* Transfer Case Gears:

Qty:

Warehouse Availability:

HK: In stock (ships worldwide)

US: Out of stock (ships within US and US territories only)

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On US orders $120+ (including territories)

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Tagged Keywords BRX01 AWB Optional PartsBRX01 AWB Parts

PRODUCT DESCRIPTION

Want a truly unique, bespoke chassis?

For the first time, you can order a custom-configured Boom Racing chassis, built your way.

The BRX01 AWB Custom Builder’s Kit is based on our two BRX01 AWB Builder’s Kits, the leafed kit BR8011, and the linked kit, BR8014. Mix, match, and add the accessories you want to create a build that is truly your own.

Why “Holy Grail”?

For many years, the scale crawler industry has lacked a truly customizable crawler chassis. Builders were forced to compromise, upgrade later, or spend extra money just to achieve the configuration they actually wanted.

The BRX01 AWB Holy Grail Custom Builder’s Kit changes that.

This platform allows builders to choose their setup from the start. Links, leaf springs, or hybrid suspension. Adjustable wheelbase. Adjustable width. Straight axles or portal axles. Different transfer case, different gearing ratios. All within one unified system.

Instead of locking you into a single layout, the Holy Grail Custom Builder's Kit adapts to your vision. You build exactly the truck you want, without replacing core components or rebuying parts.

You get to choose:

  • Base kit
    • Fully Linked
    • Full leaf
  • Wheelbase
    • 305-325mm / 12.0-12.8 in
    • 285-305mm / 11.2-12.0 in
    • 265-285mm / 10.4-11.2 in
  •  Axle
    • Straight axles
    • Portal axles
    • Hybrid (mullet)
  • Transfer case type
    • B2X (standard)
    • SWD (2wd/4wd)
    • DIG
  • Transfer case gears
    • Overdrive (32%)
    • Standard

This custom truck is suitable for builders of all experience levels. Even if you are new to crawling or assembling your first custom truck, this build is designed to be approachable and rewarding.

Chassis Features:
  • Drive System: Full-Time Shaft Driven 4WD
  • Transmission: BCF2™ with Hi/Lo 2-speed gears
  • Suspension: Full link or full leaf
  • KUDU™ Scale Shocks (front 80mm / rear 70mm)
  • Chassis Rails: 7mm Billet Aluminum Adjustable (20mm range)
  • Drivelines: KUDU™ Heavy-Duty Front & Rear Steel CVD Center Drive Shafts
  • Drivetrain Gears: Machined HD Steel
  • Front Axle Gears: High-pinion AR44 heavy-duty triangulated helical cut 30/8T steel gears
  • Rear Axle Gears: Reversed high-pinion AR44 heavy-duty triangulated helical cut 30/8T steel gears
  • Transmission to T-Case: HD High-Efficiency Steel Output Shaft
  • Rails: Adjustable 7mm Billet Aluminum Rails (available in standard, XL, 2XL lengths)
  • Waterproof receiver box with silicone seals and stainless steel chassis plate
  • ESC Plate: Forward (Aluminum)
  • Servo Position: Front of motor
  • Steering: Chassis-Mounted Servo
  • Wheel Hex: Aluminum 8mm


Chassis Specifications:

  • Motor Size: 540 / 550 (not included)
  • Gear Pitch: 12T 32P Pinion / Spur, 48P T-Case

Scale PHAT Axle choices:
  • Front:
    • BRX70 straight 148.5mm pin-to-pin
    • BRX80 straight 162mm pin-to-pin
    • BRX90 straight 176mm pin-to-pin
    • BRX70 portal 160.4mm pin-to-pin
    • BRX80 portal 173.5mm pin-to-pin
    • BRX90 portal 188mm pin-to-pin
  • Rear:
    • BRX70 straight 146mm pin-to-pin
    • BRX80 straight 162mm pin-to-pin
    • BRX90 straight 176mm pin-to-pin
    • BRX70 portal 160.4mm pin-to-pin
    • BRX80 portal 173.5mm pin-to-pin
    • BRX90 portal 188mm pin-to-pin
Note: Portal axles come with XT pumpkin diff cover #BRLC7088.

Overdrive gears:
The heavy-duty machined steel overdrive gear set is designed for multiple transfer cases, including B2X, SWD, DIG, and Overdrive transfer cases (overdrive t-case includes OD gears), and is fully compatible with all four configurations.

The gears are an optional upgrade for the B2X, DIG, and SWD (2WD/4WD) transfer cases, and serve as replacement stock gears for the Overdrive transfer case.

When installed, the front wheels rotate 32% faster than the rear, while the rear axle gains a 42% gear reduction compared to standard transfer case gearing. This results in improved climbing performance, smoother power delivery, and reduced drivetrain load under demanding trail conditions.

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