For maximum exhaust flow and quicker turbo spool up, HKS offers downpipes for racing use. Each mandrel bent down pipe is a bolt-on application that will mount to the stock turbo and/or to a HKS turbo upgrade kit. Certain HKS Downpipe applications are made from coated stainless steel or polished SUS304 stainless steel piping. All HKS down pipes are FOR OFF ROAD USE ONLY.
| Application | Piping Dia. (mm) | |
|---|
| MAZDA |
|---|
| RX-7 1987-1991 Turbo (1) | 75 | |
| RX-7 1993-1996 Turbo (2) | 75 | |
| MITSUBISHI |
|---|
| Lancer Evolution 2003 (3) | 65 | |
| SUBARU |
|---|
| Impreza WRX 2001-2003 (4) | 75 | |
| TOYOTA |
|---|
| Supra 1986.5-1992 Turbo (5) | 75 | |
| Supra 1993-1998 Turbo (6) | 75 | |
Notes
- Stock & Sport Turbo, Eliminates Pre-Cat - *Requires flange modification for use with stock main Cat.* (Off-Road Use Only)
- Stock Turbos, Eliminates Pre-Cat (Off-Road Use Only)
- Polished Stainless Steel
- Stock Turbo w/ HKS Exhaust, Eliminates (2) Rear Cats (Off-Road Use Only), Stainless Steel / Coated
- Stock & Sport Turbo, Eliminates Pre-Cat (Off-Road Use Only)
- Front Pipe - Eliminates Main Cat (Additional O2 sensor fitting required) (Off-Road Use Only)
