The Concord ST‑CD‑15/20 (3‑blade) impeller is designed for Sea‑Doo personal watercraft equipped with a 155.5 mm pump—typically the larger 83 mm bearing carrier used on the 951 cc platform.

The Concord design offers strong low-end acceleration and improved top‑end speed—ideal for water‑skiing, cruising, or performance riding.
Impros, LLC

Built from polished stainless steel with a radial leading edge for greater thrust and efficiency.

If you're running a Sea‑Doo XP, GTX, RX, GSX, LRV or Sportster from the late '90s to mid‑2000s with a 155.5 mm pump, the Concord ST‑CD‑15/20 impeller is a perfect fit to boost acceleration and top speed.


| Model Family | Years | Engine (cc) | Impeller Pitch |
| --------------------------------------------------------------- | --------- | ---------------------- | -------------- |
| XP / XP DI | 2000–2004 | 951 | ST‑CD‑15/20 |
| 951 Sportster LE DI | 2000–2005 | 951 | ST‑CD‑15/20 |
| XP Ltd / GTX 951 DI | 2000–2003 | 951 | ST‑CD‑15/20 |
| RX / RX DI | 2000–2003 | 951 | ST‑CD‑15/20 |
| GSX / GSX Ltd / GTX Ltd / XP Ltd (98‑99) | 1998–1999 | 951 | ST‑CD‑15/20 |
| LRV / LRV DI | 1999–2003 | 951 (and some 720/785) | ST‑CD‑15/20 |