What is the advantage of internal fluid ports?

Internal fluid ports eliminate the need for external crossover tubes. This design contributes to a cleaner look and can improve fluid dynamics within the caliper for more consistent braking performance.

What does the staggered piston size mean for my brakes?

The staggered piston sizes (1.62-inch and 1.38-inch) help to balance brake force distribution across the brake pad. This can lead to more even pad wear and optimized braking performance.

What rotor diameter and thickness is this caliper designed for?

This Aero4 caliper is designed to work with rotor diameters ranging from 12.88 inches to 15.00 inches and is specifically made for a 1.25-inch disc thickness.

Wilwood Aero4 Brake Caliper Black 1.62/1.38in Pistons 120-13

Name: Wilwood Caliper-Aero4-L/H - Black 1.62/1.38in Pistons 1.25in Disc
Brand: Wilwood
SKU: wilwood-wilwood-caliper-aero4-l-h-black-1-62-1-38in-pistons-1-25in-disc-t14-139584
Price: 575.19 USD
Availability: BackOrder

Wilwood Caliper-Aero4-L/H - Black 1.62/1.38in Pistons 1.25in Disc

$575.19

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Wilwood Aero4 forged four piston brake caliper in black. Features 1.62/1.38in pistons and 1.25in disc.

Key Features

This caliper fits a 1.25 inch disc thickness.
Features staggered pistons: 1.62 inch and 1.38 inch.
Incorporates internal fluid ports, eliminating external crossover tubes.
Radial mounting design offers widespread adaptability.
Forged aluminum construction provides a strong and lightweight caliper body.
Designed for rotor diameters ranging from 12.88 inches to 15.00 inches.

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Product Details

With internal fluid ports that eliminate external crossover tubes, the Wilwood Aero4 forged four-piston caliper is built for serious stopping power, whether you're on the street or the track. This caliper is a direct evolution of Wilwood's W4A and W6A series, incorporating race-proven technology into a versatile body design. Its radial mounting and options for piston volume, combined with compatibility for rotor diameters from 12.88 inches up to 15.00 inches, make it adaptable for a wide range of heavy-duty braking needs.

The Aero4 caliper features staggered piston sizes – 1.62 inches on one side and 1.38 inches on the other – which helps to balance brake force and ensure even pad wear. This design choice is crucial for maximizing the effectiveness of your braking system and extending the life of your brake pads. The robust forged aluminum construction offers a strong yet lightweight foundation, ready to withstand the demands of spirited driving and track use. Its sleek black finish also adds a clean, performance-oriented look to your wheel assembly.

This caliper is designed to work with a 1.25-inch disc thickness, so be sure to pair it with compatible rotors for optimal performance. While this caliper offers broad adaptability, it's always a good idea to consult Wilwood's technical documentation or an experienced mechanic to confirm fitment with your specific vehicle's brake system and wheel clearance.