Aluminum
Lightweight and common in performance and OE-style calipers. Suitable where weight reduction and fast thermal response are part of the brake system design.
Email: sales@ttsport-racing.com
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Product Detail
xCaliper Service Parts · Replacement Pistons · Aluminum / Stainless Steel / Titanium
Replacement Brake Caliper Pistons
Caliper pistons are the working heart of every hydraulic brake. They convert line pressure into pad clamping force, transfer heat back from the pad, and must slide cleanly so the pad can release without drag. Worn, corroded, or heat-glazed pistons hurt pedal feel, shorten seal life, and accelerate uneven pad wear. These replacement pistons are built for caliper service, rebuilds, and targeted material upgrades.
Why Piston Condition Matters
- Sealing surface: a smooth, true outside diameter is what the square-cut seal rides against. Pitting or scoring can damage the seal, cause leakage, or create piston drag.
- Heat path: the piston crown sits against the pad backing plate. Material, wall thickness, and crown design affect how much heat reaches the brake fluid.
- Retraction: the seal rolls the piston back slightly during release. A dragging or sticky piston can create hot rotors, uneven pad wear, and poor pedal return.
- Dust protection: the dust boot keeps grit and water away from the seal area. Boot style must match the caliper groove.
Material Options
Stainless Steel
High strength and strong corrosion resistance. A practical choice for daily-driven, wet-climate, or track vehicles where pitting and seizure are common failure modes.
Titanium
Low thermal conductivity helps reduce heat transfer into the brake fluid. Best suited to repeated high-temperature use such as track and time-attack calipers.
Material upgrades only help if the piston outside diameter, height, crown profile, seal groove location, and dust-boot type match your caliper exactly.
Specifications
| Brake Caliper Piston | |
|---|---|
| Component | Brake caliper piston / service-rebuild part |
| Materials Offered | Aluminum, stainless steel, titanium |
| Function | Hydraulic actuation of brake pad against rotor |
| Application | Caliper rebuild, piston upgrade, corrosion replacement, heat-damage replacement |
| Fitment Basis | Piston diameter, height, crown style, seal type, dust-boot style |
| Sold As | Service piece — verify quantity needed per caliper |
This product page describes replacement brake caliper pistons only. Calipers, piston seals, dust boots, brake pads, brake rotors, brake hoses, brake fluid, brackets, rotor hats, and installation hardware are not included unless separately specified on the final order.
Before You Order — Verify Fitment
- Exact caliper make, model, and piston count, such as 4-piston, 6-piston, opposed-piston, or floating-caliper layout.
- Piston outside diameter and overall height measured accurately.
- Crown profile: flat, stepped, recessed, or insulated cap.
- Seal type already used in the caliper bore, such as square-cut seal or lip seal.
- Dust-boot style: external clip-in boot or internal groove boot.
- Whether all pistons in the caliper share the same diameter or use staggered piston sizing.
Not sure what fits your caliper? Send us caliper photos, piston measurements, crown photos, and seal / boot groove photos. TTSPORT will help confirm before you buy.
Installation Safety
- Replace caliper seals and dust boots whenever pistons are removed.
- Clean the bore; do not reinstall a piston into a pitted, scored, or contaminated bore.
- Lubricate the seal and piston outside diameter with the brake fluid or assembly lube specified for your seal compound.
- Press pistons in straight — never cocked, forced, or dry.
- Bleed the brake system fully and check for leaks before road use.
- Brake work should be performed by a qualified technician. Confirm pedal firmness, leak-free operation, and pad clearance before driving.
Safety: A wrong piston can cause leakage, dragging brakes, uneven pad wear, or brake failure. Confirm piston dimensions, seal type, and dust-boot style before installation.
Service Notes
- Inspect piston surfaces for pitting, scoring, corrosion, heat discoloration, and uneven wear.
- Do not mix piston materials within one caliper unless the caliper was engineered for that configuration.
- Use a matched piston set per caliper whenever possible.
- Inspect seals and dust boots at the same time; piston replacement without seal inspection is incomplete service.
- After installation, confirm even piston movement and even pad retraction on both sides of the rotor.
Frequently Asked Questions
Will any piston of the right diameter work in my caliper?
No. Diameter is only the start. Height, crown profile, seal groove location, dust-boot style, and caliper bore design must all match. A close-but-wrong piston can leak, drag, or damage the seal.
Which material should I choose?
Stainless steel is the practical upgrade for street cars, wet climates, and corrosion resistance. Titanium is best for repeated high-heat track use where reducing heat transfer into the brake fluid matters. Aluminum suits weight-focused performance builds when the caliper design supports it.
Do new pistons come with seals and dust boots?
No. This listing is for the piston only. Always replace seals and dust boots during a rebuild and order the matching seal kit for your caliper.
How do I measure my old piston?
Measure outside diameter with calipers at multiple points, then measure overall height from crown to base. Photograph the crown profile, seal groove, and dust-boot groove, then send them to us for confirmation.
Can I mix materials across pistons in one caliper?
We do not recommend it. Mixed materials can change clamping balance and heat behavior across the caliper. Use a matched set per caliper unless the caliper was specifically engineered for mixed piston materials.
Need fitment confirmed for your caliper?
Send your caliper model, piston count, piston diameter, piston height, crown photos, and seal / dust-boot groove photos. TTSPORT will help confirm the correct replacement piston before you order.
Care Guide
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