HKS Super SQV (Sequential Blow Off Valve) uses a unique sequential valve structure and a differential pressure control system, which allows for a broad operating range from low boost to high boost. Its Pull-Type relief design ensures stable operation regardless of the amount of boost pressure. The Super SQV will support new generations of turbocharged vehicles.
- SUBARU WRX 4D FA20 2015 - 2021
Installing this product creates unique sharp & high frequency SQV sound. The SQV IV unit is designed to be located beside the engine so the appurtenance of the engine bay is improved.
The suction-return parts are included (those are necessary to pass the Japanese Automobile Inspection.).
Any engine failure such as engine stall was not occurred during the in-house testing.
| Revving in the cabin | Stock | No sound | S | M | L |
| Super SQV | No sound | S | M | L |
| Revving outside the cabin | Stock | No sound | S | M | L |
| Super SQV | No sound | S | M | L |
| Driving revving window closed | Stock | No sound | S | M | L |
| Super SQV | No sound | S | M | L |
| Driving revving window open | Stock | No sound | S | M | L |
| Super SQV | No sound | S | M | L |