4-Piston Rear Caliper Pair for Porsche Taycan / Audi E-Tron GT – 4J3615423H / 4J3615424H

Name: 4-Piston Rear Caliper Pair for Porsche Taycan / Audi E-Tron GT – 4J3615423H / 4J3615424H
Brand: ForzaCCB.com
SKU: 8289328496779
Price: 2100.00 USD
Availability: InStock

Only 2 left

Price per pair

$2 100

~~$3 400~~ Sale $2 100

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OEM Rear Brake Calipers — 4J3615423H / 4J3615424H — New

Condition: New, genuine OEM. These calipers were supplied for rear axle applications and were ordered specifically for Porsche Taycan rear fitment in combination with carbon‑ceramic rotor (CCB) projects.

What’s included

>1 × Left rear brake caliper — 4J3615423H >1 × Right rear brake caliper — 4J3615424H

Original application

These units are OEM rear calipers supplied for the J1 platform family and marked for Audi e‑tron GT rear axle (label shows “E‑TRON GT HA”); they were ordered for use on Porsche Taycan rear axle / CCB rotor projects. Please treat the part numbers above as the primary reference for fitment verification.

Direct fit / recommended application

>Direct OEM application: Audi e‑tron GT (rear) — verify PR codes and exact part suffix prior to installation [file label shows e‑tron GT HA and part 4J3615424H]. >Primary intended swap: Porsche Taycan (J1 platform) rear axle when paired with the corresponding CCB / ceramic rotor kit — purchased originally for a Taycan + CCB rotor program.

Swap & compatibility notes (must read)

Although Taycan and e‑tron GT share the VW Group J1 performance architecture, do not assume universal bolt‑on compatibility across trims. Before ordering for a swap, confirm all of the following with your fitter or technician:

>Rear rotor diameter and thickness (example OEM CCB rear: 410×32 mm on J1 carbon setups) [forzaccb rotor specs]. >Caliper mounting ear geometry and carrier compatibility. >Brake pad backing plate and pad shape match (or availability of matching pads/adapters). >Electronic parking brake mechanism and sensor harness routing. >Brake hose / banjo bolt configuration and hand‑bleed / line routing. >Wheel inner barrel and spoke clearance for yellow caliper and caliper width. >ABS/ESC system calibration — a professional re‑bleed and system check is required after swap.

Condition & photos

New condition, painted yellow, OEM labels present (see photos). Units were handled for project inventory and show OEM packaging marks. Photo label confirms part 4J3615424H and E‑TRON GT HA designation.

Shipping

Ships worldwide from ForzaCCB hub. For international customers we strongly recommend VIN or OE part confirmation prior to dispatch.

Need help confirming fitment?

Send us your VIN, model year, and brake option (PCCB / PSCB / standard) and we will confirm whether these calipers match your car or what adapter/rotor pairing is required.

CCB Rotor & Wheel Fitment Guide

Minimum wheel diameter guidance by rotor size. Always validate final fitment using a physical template and measured clearances.

Rotor Size (Diameter x Thickness)	Minimum Wheel Size	Technical Fitment Notes
310mm × 22mm	16-inch	Fits most 16-inch wheels. Installation on 15-inch wheels is possible only with specific low-profile callipers and is not generally recommended.
330mm × 28mm	17-inch	Standard entry-level size for performance brake upgrades. Fits comfortably within most 17-inch alloy wheels.
345mm - 356mm × 32mm	18-inch	Common mid-range size. Requires 18-inch wheels with standard barrel clearance.
380mm × 32/34mm	19-inch	The industry standard for Carbon Ceramic (CCB) and heavy-duty steel systems. Fits most 19-inch wheels; verify spoke clearance for wider callipers.
390mm × 36mm	19-inch (Tight Fit)	Fits 19-inch wheels with high-clearance barrels (flat inner bed). 20-inch wheels are recommended to ensure adequate air gap for cooling.
400mm - 405mm × 36/38mm	20-inch	Requires 20-inch wheels. Ensure the wheel barrel does not taper significantly near the mounting face.
410mm - 420mm × 38/40mm	21-inch	Standard fitment for 21-inch wheels. Can fit select 20-inch motorsport wheels with specialised flat barrel profiles (template verification required).
440mm × 40/42mm	21-inch (Minimum)	Extreme fitment. 21-inch is the absolute minimum requirement. 22-inch wheels are strongly advised for safe operating clearance and heat dissipation.

Essential Clearance Requirements

To ensure safety and prevent damage to components, please observe the following industry-standard tolerances when measuring your wheels:

Radial Clearance (Barrel): A minimum gap of 3mm is required between the top of the calliper and the inner wheel barrel to account for heat expansion and wheel deflection under load.
Axial Clearance (Spokes): Ensure a minimum of 3mm clearance between the face of the calliper and the rear of the wheel spokes.
Balance Weights: Ensure wheel balancing weights are positioned so they do not foul the brake calliper. We recommend placing weights outboard of the calliper zone for tighter fitments.

Important Fitment Disclaimer

The wheel sizes listed above represent minimum technical requirements based on standard barrel profiles. Due to significant variation in alloy wheel designs, particularly spoke curvature (X-factor) and inner barrel contours, meeting nominal diameter alone does not guarantee compatibility.

We strongly recommend verifying clearance instrumentally using printable fitment templates rather than relying only on visual estimates or stated wheel specifications. Please ensure at least 3mm clearance in all directions to account for thermal expansion and dynamic wheel deflection.