SKU: 130-3602 | UPC: 889545007985
Wilwood O-Ring Kit - GP200/300/310/320/340 Square Seal - 4 pk. Fits All Years Wilwood GP Series Calipers
This Wilwood O-Ring Kit includes four square section seals with .729 inch ID x .070 inch cross-section for piston sealing in GP200 GP300 GP310 GP320 and GP340 calipers. These O-rings ensure fluid-tight operation to stop leaks under high-pressure braking in racing and performance applications. Kit arrives direct from Wilwood for fast caliper rebuilds in brake caliper rebuild kits.
Key Features
- Precise Sizing: .729 ID x .070 CS matches GP series caliper bores for exact fit and reliable compression.
- Square Profile Design: Provides greater contact area than round O-rings to resist extrusion under extreme brake pressure.
- High-Temp Elastomer: Resists degradation from brake fluid heat up to 400F and repeated cycling for extended service life.
- 4-Pack Quantity: Includes spares for rebuilding multiple calipers or keeping on-hand for trackside service.
- Manufacturer Direct: Engineered and produced by Wilwood for consistent quality in every rebuild.
Product Notes
- Inspect caliper bores for scoring before installing new O-rings.
- Store in cool dry place to maintain material integrity.
- Packaged in protective poly bag for clean delivery.
Installation Notes
- Professional installation recommended.
- Lubricate O-rings with Wilwood assembly fluid during install.
- Compatible with standard Wilwood caliper rebuild kits and hardware.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| All Years | Wilwood | GP200 | Square Seal Caliper |
| All Years | Wilwood | GP300 | Square Seal Caliper |
| All Years | Wilwood | GP310 | Square Seal Caliper |
| All Years | Wilwood | GP320 | Square Seal Caliper |
| All Years | Wilwood | GP340 | Square Seal Caliper |
Why Choose Wilwood?
- Proven components in NHRA NASCAR and SCCA racing.
- Brake parts built for high-heat high-pressure demands.
- Exact engineering tolerances for zero-compromise sealing.
Frequently Asked Questions
-
Q: Which calipers use these O-rings?
A: Designed exclusively for Wilwood GP200 GP300 GP310 GP320 GP340 models with square seal pistons. Confirm your caliper series before ordering. -
Q: What material resists brake fluid best?
A: Advanced fluoroelastomer compound handles DOT 3/4/5 fluids glycol ethers and temperatures over 400F without swelling or cracking. -
Q: How long is the warranty on this kit?
A: Wilwood offers 90-day defect coverage. performance depends on proper installation and compatible rebuild procedures.
Shipping &. Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Poly bag in 4 x 4 x 1 inch box
- Weight: 0.10 lbs
Brake Caliper Rebuild Kits
Shop premium brake caliper rebuild kits at Black Ops Auto Works, your trusted source for high-performance caliper seal kits, pistons, O-rings, and rebuild components. Our collection is designed to help you restore braking performance, reliability, and safety for cars, trucks, and performance vehicles. Whether you’re maintaining OEM brakes or rebuilding high-performance calipers, our caliper rebuild kits provide the components you need for a complete and efficient restoration. Shop High-Performance Brake Caliper Rebuild Kits At Black Ops Auto Works, we specialize in brake caliper rebuild kits engineered for precision fitment and long-term durability. These kits are ideal for restoring worn or leaking calipers and maintaining optimal braking performance. What’s Included in Caliper Rebuild Kits: Caliper Seals & O-Rings – Prevent leaks and maintain hydraulic pressure Brake Pistons – Restore proper caliper function and braking force Dust Boots & Hardware – Protect components...
View Brake Caliper Rebuild Kits Products
Brake Calipers
Aftermarket and replacement brake calipers upgrade stopping power and restore factory braking performance. Whether you need a direct OE-replacement caliper or a performance upgrade with more pistons and better bite, the right caliper makes a measurable difference in braking feel. Popular ProductsPopular brake caliper choices include Brembo 4-piston and 6-piston performance calipers for track use, and direct-fit replacement calipers from brands like Cardone and Raybestos for daily drivers needing a reliable factory repair. How do I know when my brake calipers need replacement?Signs of a failing brake caliper include uneven brake pad wear, the vehicle pulling to one side when braking, a sticky or dragging brake pedal, and visible caliper fluid leaks. Seized pistons are the most common cause of caliper failure. Can I use performance calipers on a stock setup?Performance multi-piston calipers typically require larger rotors and may need caliper brackets or hub spacers to fit. Always ver...
View Brake Calipers Products
Brakes
Performance Brakes, Brake Pads, Rotors & Big Brake Kits Shop premium performance brake parts, brake pads, brake rotors, big brake kits, brake calipers, brake line kits, stainless steel brake lines, brake hardware, brake master cylinders, brake drums, brake shoes, hand brakes, and brake adapters at Black Ops Auto Works. This collection is built for drivers who need dependable stopping power, improved pedal feel, fade resistance, and braking confidence for street performance, towing, daily driving, racing, off-road use, and custom builds. Whether you are upgrading a muscle car, truck, SUV, Jeep, Dodge, Ford, BMW, Audi, Nissan, Honda, Subaru, Lexus, Hyundai, Mazda, Infiniti, Toyota, or track-focused vehicle, our Brakes collection includes high-quality brake system components designed for fitment, durability, and performance. Brake Parts from Top Brands Shop trusted brake brands available in our catalog, including: DBA brake rotors EBC Brakes pads and rotors Hawk Performance brake ...
View Brakes Products
Wilwood
Wilwood Engineering designs and manufactures high-performance disc brake systems. Since the company’s inception in 1977 by Bill Wood, Wilwood Disc Brakes has developed a substantial matrix of brake components and engineering techniques that allow us to quickly and reliably create brake systems for almost any application. Wilwood Disc Brakes' core ability is the rapid development of custom engineered brake systems using a combination of off-the-shelf and custom components. In addition to designing and manufacturing brakes for all types of competitive motorsports, Wilwood also manufactures brake systems and components for agricultural equipment, industrial applications, utility vehicles, snowmobiles, quads, motorcycles and military vehicles. Wilwood is ISO 9000 compliant and has extensive experience maintaining quality levels of 100ppm or less for original equipment manufacturers. Wilwood's engineering department uses the latest computer-aided design and manufacturing techniques in co...
View Wilwood Products


