The Dinan Valved Cat-Back Exhaust for the A90/A91 Toyota GR Supra 3.0 is TIG-welded from brushed 100% T304 stainless steel with no hydroformed pipe. It abandons the factory single-to-dual layout for an enlarged, free-flowing single-pipe design measuring up to 83mm, feeding a drone-limiting muffler that delivers the signature low Dinan rumble while retaining factory valve control for on-demand volume. Removing the factory resonator and collector raises volume, and the system saves 10 pounds over stock while adding up to +6 HP and +5 lb-ft. Gases exit through dual straight-cut 4.5-inch (114.3mm) double-walled tips laser engraved with the Dinan logo.
Specifications
| Type | Valved cat-back exhaust |
| Position | Cat-back (full system aft of catalysts) |
| Material | 100% T304 stainless steel, TIG-welded, brushed |
| Tubing Diameter | Up to 83mm (vs 80mm stock) |
| Tips | Dual 4.5in (114.3mm) double-walled clamp-on, straight cut, laser-engraved Dinan logo |
| Tip Finish | Black ceramic coated |
| Power Gain | +6 HP / +5 lb-ft (max) |
| Weight Savings | 10 lb lighter (46 lb vs 56 lb stock) |
| Part Number | D660-0096-BLK |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2022 | Toyota | GR Supra | A91 Edition |
| 2020-2026 | Toyota | GR Supra | Base |
| 2020-2026 | Toyota | GR Supra | Premium |