Brakes› Master Cylinders-Boosters and Components

Crown Automotive

HD Dual Diaphragm Brake Booster with 1 inch Bore Master Cylinder for Misc. CJ, YJ RT Off Road

$750.75

SKU: C01X RT31011

In Stock
In Stock
Ships by Sep 14
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

These heavy-duty power brake conversion kits convert a single diaphragm booster to a dual diaphragm setup which creates more stopping power with less pedal pressure. Note: Engine vacuum needs to be a minimum of 18 inches of vacuum at idle when the engine is warm for the power brake setup to function properly.
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Part #: RT31011

Replace your rusty, leaky, and faulty brake booster & master cylinder with a HD kit from RT Off-Road. Two performance level kits were designed to specifically cater to the vehicles requirements. The larger bore master cylinders are designed for upgrades done to axles with larger brake calipers. The more moderate bore is designed for vehicles with factory brakes, disc brake upgrades, and vehicles that require more braking power. Each kit consists of a zinc-coated brake booster, master cylinder, bench bleeding kit, and installation instructions. Installation involves replacing the factory brake booster & master cylinder

Features:

  • Hd Brake Booster Kit

Hd Brake Booster Kit

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandCrown Automotive
Part NumberC01X RT31011
5,000+ Trusted brands
1M+ Enthusiasts
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(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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