Fitment questions?
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Product details
This black Dynapro DS rear conversion retains the GTO's original internal parking brake while replacing the hydraulic calipers and service rotors. The package uses 12.19-inch GT-slotted iron rotors and BP-20 pads, with the backing-plate modifications specified by Wilwood. Calipers, brake rotors, master cylinders, valves, fittings and brake lines are all part of Wilwood Engineering’s range of disc brake systems and components. The Camarillo, California company was founded in 1977 by Bill Wood and designs and manufactures these products for motorsport, street-performance and specialized applications. Compatibility with the complete brake system determines the appropriate component choice.
Technical Details
- Manufacturer part number: 140-8754
- Service calipers: 4-piston Dynapro Dust Seal Radial Mount; Black Powder Coat; radial mounting
- Brake rotors: 12.19 x 0.81 inches; Iron; GT Slotted; vented
- Included pad compound: BP-20; pistons: stainless steel
- Caliper body: Forged aluminum; hydraulic inlet: 1/8-27 NPT
- Rotor surface finish: Black Electro Coat; rotors are not supplied burnished
- Rotor/hat wheel-stud clearance pattern(s): 5 x 4.75 in; 5 x 120.65 mm; the existing hub/axle pattern is retained
- Hat/rotor stud-hole clearance: 0.52 in; 13.21 mm; this is not a wheel-stud thread designation
- Parking brake: retain the original internal parking-brake mechanism; no replacement cable kit is supplied
- Hydraulic hoses: not included; match the separate lines and fittings to the application
- Kit includes calipers, rotors and mounting hardware; replacement hubs and spindles are not included
- Not included: master cylinder and brake booster
- Wheel clearance: 15-inch wheels may fit; check the complete manufacturer caliper/rotor template
- Quantity: sold as one axle kit
Fitment & Compatibility
Fits the listed 2004–2006 Pontiac GTO rear applications while retaining the original internal parking-brake mechanism. The supplied service rotors incorporate the parking-drum interface; existing hubs and parking-brake components must be serviceable.
The stock backing plate/caliper bracket and dust shield require the modifications in DS494. Brake hoses are not included. Wilwood currently lists rear flexlines 220-8756 for 2005–2006 GTO; verify the 2004 hose arrangement before ordering, because the older instruction-sheet hose reference differs.
Use the fitment table below to confirm the exact model, year, trim and all numbered application notes.
Manufacturer Resources
- Wilwood kit specifications and wheel-clearance information
- Installation instructions and component list
WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.
With over 20 years of parts and fitment experience, PMB Performance can help review the intended brake installation. Provide your VIN, wheel measurements and any modified axle or spindle details when asking about compatibility.
Vehicle Applications
| Years | Make | Model | Model option | Front brakes | Rear brakes | Kit application | Notes |
|---|---|---|---|---|---|---|---|
| 2004-2006 | Pontiac | GTO | All | Disc | Disc | Rear Kit | 1, 2, 3 |
| 2004-2006 | Pontiac | GTO | All | Disc | Disc | Rear Kit | 1, 2, 3 |
Application Notes
- Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
- Line kit included (manufacturer): None
- Rear line-kit reference: 220-8756
