Name: RT Offroad HD Dual Diaphragm Brake Booster with 1" Bore Master Cylinder for Misc. CJ, YJ Jeep
Brand: RT Offroad
SKU: RT31011
Price: 548.63 USD
Availability: InStock

// THE FULL RUNDOWN

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 Hd Brake Booster Kit Features Notes: Heavy Duty; w/1 in. Bore Master Cylinder Other Part Numbers: RT Offroad #RTRT31011 Proposition 65 ⚠ WARNING: Cancer and Reproductive Harm https://www.P65Warnings.ca.gov

// WILL IT FIT? THE STRAIGHT ANSWER

VEHICLE	YEARS	TRIM
Jeep CJ5	1976-1983	Renegade
Jeep CJ5	1976-1983	Base
Jeep CJ5	1977-1980	Golden Eagle
Jeep CJ5	1980-1983	Laredo
Jeep CJ5	1982-1983	Limited
Jeep CJ7	1976-1986	Base
Jeep CJ7	1976-1986	Renegade
Jeep CJ7	1977-1979	Golden Eagle
Jeep CJ7	1980	Golden Hawk
Jeep CJ7	1980-1983, 1985-1986	Laredo
Jeep CJ7	1982-1984	Limited
Jeep CJ7	1983-1984	Renegado
Jeep Scrambler	1981-1985	Base
Jeep Scrambler	1982-1984	SR
Jeep Scrambler	1982-1983	SL
Jeep Scrambler	1985	Laredo
Jeep Scrambler	1985	Renegade
Jeep Wrangler	1991-1994	Renegade
Jeep Wrangler	1991-1995	Base
Jeep Wrangler	1991-1994	S
Jeep Wrangler	1991-1995	Sahara
Jeep Wrangler	1991-1992	Islander
Jeep Wrangler	1994-1995	SE
Jeep Wrangler	1995	Rio Grande

JAP FITMENT PROMISE // If we confirm fitment for your rig and it doesn't fit, return shipping is on us. No restocking fee. That's the deal.

// GETTING IT TO YOUR GARAGE

THIS PART //

Ships UPS/FedEx ground — estimated $34.95. Additional ground items in the same order ship at reduced rates. Exact rate calculated at checkout.

REAL-COST SHIPPING

We charge what the carrier charges — no padding, no games. Ground parcels via UPS/FedEx, signature required. You see the exact number before you pay.

1-2 DAY HANDLING

Most in-stock parts leave the warehouse within 1-2 business days. Built-to-order parts show extended lead times.

LTL FREIGHT FOR THE BIG STUFF

Bumpers, hardtops, axles and full kits ship LTL truck freight (typically $400-500 per unit, plus shipping protection). Freight is charged per unit — two bumpers means two freight charges. Inspect before signing and note any damage on the delivery receipt.

30-DAY RETURNS

Unused, uninstalled parts in original packaging within 30 days. RMA required — start with a quick message. Shipping charges are non-refundable; freight returns quote at carrier rates.

FULL SHIPPING & RETURNS POLICY

// PAY YOUR WAY

CHECKING PAYMENT NETWORK…

ALL MAJOR CARDS + WALLETS

Visa, Mastercard, Amex, Discover, Apple Pay, Google Pay and Link one-tap checkout — live in our Stripe checkout right now. Card numbers never touch our servers.

BUY NOW, PAY LATER — LIVE

Klarna, Afterpay and Zip are active at checkout on eligible orders. Pick your split at payment — get the lift now, pay as you wheel. No JAP paperwork, approval happens right in checkout.

CRYPTO — LIVE AT CHECKOUT

Pay with crypto directly in our Stripe checkout — select the crypto option at payment and settle in USDC and supported coins. On-chain payment, standard order flow, same warranty.

3-D SECURE + RADAR ANTI-FRAUD

Every card payment runs Stripe Radar machine-learning fraud screening, with 3-D Secure (Visa Secure / Mastercard Identity Check) stepping in automatically when your bank requires it. Your card, verified by your bank.

PCI-DSS L1

HIGHEST CARD-SECURITY CERTIFICATION

AES-256 + TLS 1.3

ENCRYPTED IN TRANSIT & AT REST

TOKENIZED

WE NEVER SEE YOUR CARD NUMBER

Payments are processed by Stripe — the same infrastructure behind Amazon, Ford and Shopify checkouts. Dispute protection and receipt trails on every order. See our Privacy Policy.

// COVERED WHEN IT COUNTS

THIS PART //

Backed by the full RT Offroad manufacturer warranty. JAP is an authorized dealer — your warranty is valid from day one.

FULL MANUFACTURER WARRANTY

Every part ships new in the box with the manufacturer's standard warranty — terms and duration vary by brand (typically 1 year to limited lifetime on hard parts). We only sell through authorized channels, so coverage is never voided by gray-market sourcing.

WE RUN THE CLAIM WITH YOU

Warranty issue? Don't fight the manufacturer's phone tree alone. Hit our team with your order number and photos — we open the claim with the brand and stay on it until it's resolved.

WHAT WARRANTY DOESN'T COVER

Defects in materials and workmanship are covered. Trail damage, improper installation, modification, and normal wear items (bushings, pads, wear plates) generally are not — that's standard across every brand we carry.

SEPARATE FROM RETURNS

Warranty claims (defects after use) and returns (unused parts within 30 days) are different lanes. Not sure which applies? Message us first — we'll route it the fast way.

START A WARRANTY CLAIM

FITMENT	Jeep - See Description
BRAND	RT Offroad — shop all RT Offroad parts →
PART #	RT31011
SKU	RT31011
CATEGORY	Brakes > Miscellaneous Brake Parts
AVAILABILITY	IN STOCK
RETURNS	30-day return window

RT Offroad HD Dual Diaphragm Brake Booster with 1" Bore Master Cylinder for Misc. CJ, YJ Jeep

// THE FULL RUNDOWN

// WILL IT FIT? THE STRAIGHT ANSWER

// GETTING IT TO YOUR GARAGE

// PAY YOUR WAY

// COVERED WHEN IT COUNTS

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// TRAIL REVIEWS