Rebuild Kit For Mazzulla UCA's
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Replace the worn out Rod Ends & Spherical Bearings in your upper controls arms with our Probearing Mazzulla Billet UCA Rebuild Kit. This package includes (4) Pro 8 Series Rod Ends, (2) 1.25" Spherical Bearings, (4) Jam Nuts, (2) Snap Rings, (2) Loctite's, and (3) Anti Seizes which is enough for one pair of Mazzulla Off-Road upper control arms. Probearing Rod Ends & Spherical Bearings specifically engineered to endure the most challenging off-road abuse.
Compatibility: Mazzulla Offroad upper control arms using 3/4” Rod Ends or 7/8" Rod Ends & 1.25" Spherical Bearings. Use the chart below to match your compatibility.
| Compatibility | Mazzulla SKU | PB Rebuild Kit SKU |
|---|---|---|
| Chevy/GMC 1500 (2019-2025) | MZS-C1-4 | RKU01B |
| Chevy/GMC 1500 (2016-2018) | MZS-C1-3B | RKU01B |
| Chevy/GMC 1500 (2007-2016) | MZS-C1-2B | RKU01B |
| Toyota Tacoma (2005-2023) | MZT-T1-1 | RKU01B |
| Toyota 4Runner (2010-2024) | MZS-T1-2 | RKU01B |
| Toyota FJ Cruiser (2007+) | MZT-T1-2 | RKU01B |
| Toyota Tacoma (1996-2004) | MZT-T1-6 | RKU01B |
| Chevy/GMC 2500/3500 HD (2020+) | MZS-C1-6 | RKU01C |
| Toyota Tundra (2022+) | MZS-T1-4 | RKU01C |
| Chevy/GMC 2500/3500 HD (2011-2019) | MZS-C1-5 | RKU01C |
| Ford Raptor (2017-2018) | MZS-F1-1 | RKU01C |
| Ram TRX (2021+) | MZS-D1-1 | RKU01C |
| Toyota Tundra (2007-2021) | MZS-T1-3 | RKU01C |
| Ford Raptor (2010-2014) | MZS-F1-1 | RKU01C |
| Ford Bronco (2021+) | MZS-F1-2 | RKU01C |
| Toyota Tacoma (2024+) | MZS-T1-5 | RKU01C |
| Ford Raptor (2021+) | MZS-F1-1L2 | RKU01C |
| Ford Raptor (2019-2020) | MZS-F1-1L | RKU01C |
| Toyota Sequoia (2023+) | MZS-T1-4 | RKU01C |
| Ford F-150 (2015+) | MZS-F1-3 | RKU01C |
Shop Individual Items
Every part in the Mazzulla kit, at the exact quantity the kit uses.
4×
2×
4×
2×
2×
3×Specifications
| SKU (3/4" Rod Ends & 1.25" Spherical Bearings - RKU01B) | RKU01B |
|---|---|
| SKU (7/8" Rod Ends & 1.25" Spherical Bearings - RKU01C) | RKU01C |
| In the kit | (4) Pro 8 Rod Ends, right hand (RKU01B: 3/4" · RKU01C: 7/8", F-1) · (2) 1.25" Pro 9 Spherical Bearings · (4) Jam Nuts, right hand · (2) 1.25" Snap Rings · (2) Vibra-Tite High Strength Threadlocker 1.8mL (red) · (3) Vibra-Tite Nickel Anti-Seize 1.8mL |
| Body | 4130 Chromoly body |
| Race | 17-4 PH Stainless steel bearing race |
| Ball | 400 Series stainless steel ball · 52100 Steel ball · Hard chrome plated ball |
| Liner | PTFE liner |
| Finish | Corrosion resistant black coating |
| Breakaway torque (no-load) | 6 ft-lb to 24 ft-lb |
| Compatibility | Mazzulla Offroad |
Why Probearing
- Probearing makes ball joints, bushings, rod ends, spherical bearings and related accessories designed specifically for the off-road market.
- The company is based in Lakeside, California: 10050 Marathon Pkwy, Suite 113, Lakeside CA 92040.
- Products carry a 1-year limited manufacturer warranty against defects in material and workmanship.
- Orders ship with a quality-control tag on the box (the shipping policy references it).
- Real people answer the phone and email: (619) 828-3570 · sales@probearing.com.
FAQ
Do the rod ends and bearings need grease?
No. The Probearing rod ends and spherical bearings in this kit use PTFE liners and are self-lubricating — do not pack them with grease.
What's in the kit?
This package includes (4) Pro 8 Series Rod Ends, (2) 1.25" Spherical Bearings, (4) Jam Nuts, (2) Snap Rings, (2) Loctite's, and (3) Anti Seizes which is enough for one pair of Mazzulla Off-Road upper control arms. Probearing Rod Ends & Spherical Bearings specifically engineered to endure the most challenging off-road abuse.
Which kit option do I need?
Pick the option that matches the rod end and spherical bearing sizes in your arms: 3/4" Rod Ends & 1.25" Spherical Bearings - RKU01B; 7/8" Rod Ends & 1.25" Spherical Bearings - RKU01C. Not sure? Call or email us before ordering.
What arms does this fit?
Mazzulla Off-Road upper control arms that match the rod end and spherical bearing sizes listed on this page. Use the Compatibility / option details above before ordering. Not affiliated with or endorsed by Mazzulla.
Any install tips?
Install jam nuts and thread locker where the kit calls for them, seat snap rings fully, and use anti-seize on the faces/threads noted in the instructions. If anything arrives damaged or short, email sales before installing.
What is the warranty?
One year from purchase against defects in material and workmanship, for the original purchaser. Probearing will repair or replace at its discretion. To claim, email or call with proof of purchase. The warranty does not cover installation or labor, misuse, improper installation, or normal wear.
Can I return it?
Yes, within 30 days of receiving it, in the original package and condition, if it is not installed or damaged and was bought directly from Probearing. A 3% processing fee applies. Shipped orders also have a 7% restocking fee, and neither return shipping nor the original shipping cost is refunded. Custom products are non-refundable.
Do you ship internationally?
Yes. Most orders ship via UPS or USPS. International buyers pay import taxes and fees. Orders over $500 need a signature. For bulk or freight orders, contact sales@probearing.com for a quote.
Shipping, returns & warranty
Shipping
Ships within the US and internationally, mostly via UPS or USPS, and shipping is calculated at checkout. Orders over $500 require a signature. If a package arrives damaged or short, email sales@probearing.com with your order number and photos, keep all packaging, and don't install the parts.
Full policy: Shipping policy
Returns
Returns are accepted within 30 days, unused and in the original packaging, with the fees listed above.
Full policy: Refund policy
1-Year Limited Manufacturer Warranty
Covers defects in material and workmanship under normal use, for the original purchaser. Probearing will repair or replace at its discretion. Contact sales@probearing.com or (619) 828-3570 with proof of purchase.
Details: Warranty
Questions? Talk to a real person.
Email sales@probearing.com or call (619) 828-3570
Call (619) 828-3570Email sales@probearing.com