Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
Replace the matching rear caliper on your classic Porsche 911 with a forged aluminum Wilwood D31. This rear caliper is the version for 3.00-inch mounting centers and 20 mm rotors; it is sold individually.
Check your Porsche’s brake setup
| Porsche application | Years | Position | Required configuration |
|---|---|---|---|
| Porsche 911 with the matching original two-piston brake system | 1969–1983 | Rear | Matching original two-piston rear brake arrangement; 3.00-inch mounting centers and 20 mm rotors. |
Check the mounting-bolt spacing and rotor thickness actually fitted to your car, especially if struts, hubs or brakes have been changed. Turbo and Turbo-Look models with four-piston brakes are excluded.
The D31 follows the original 3.00-inch mount geometry and is compatible with the corresponding stock-size replacement rotor and factory master cylinder. It is an OE-style caliper replacement; it does not increase rotor size or replace a complete axle brake kit.
Specifications
| Position | Rear |
|---|---|
| Construction | Forged aluminum body; stainless steel pistons; dust boots |
| Mount | Lug mount, 3.00-inch bolt centers |
| Rotor thickness | 20 mm nominal (0.79 inch) |
| Matching original rotor size | 290 × 20 mm (11.42-inch diameter) |
| Pistons | Two opposed pistons, 1.50-inch bore |
| Listed piston area | 1.77 square inches |
| Inlet thread | M10 × 1.00 |
| Brake pad shape | D31 |
| Quantity | One caliper |
What to order with it
For a complete axle replacement, order two matching calipers. D31 pads, rotors and brake hoses are separate selections. Wilwood lists 150-10-D0031K as the BP-10 pad set for this caliper family; choose pads by the installed caliper, rather than model year alone. Confirm your hose connection and wheel clearance before installation.
Documents and fitment help
Porsche 911 OE-style component application guide (opens in a new tab)
Unsure which caliper your Porsche needs? Contact PMB Performance with the model year, installed brake parts and clear photos so we can help check the match before you order.
