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The HKS Super SQV Return Plus Blow Off Valve Kit for the Honda S660 (2015–2019) delivers sharper throttle response, distinctive turbo sound and clean engine bay integration. Using HKS’s sequential pull-type valve design, this kit provides stable boost relief from low to high boost without the leakage issues common with push‑type valves.
The Super SQV IV unit mounts neatly beside the engine for an improved engine bay appearance. Out of the box it produces a unique, sharp, high-frequency discharge sound. Swap to the supplied SF100 fin to change to a lower-frequency, more subtle SQV note with reduced volume compared with the standard setting. Suction-return parts and a recirculation hose are included for a return-style (plumb-back) installation that helps maintain drivability. HKS in-house testing reported no engine stalling or related failures.
Note: Fitment has not been confirmed for vehicles produced after January 2020.
Features and Benefits
Tuned SQV sound options – Standard fin gives a sharp, high-frequency sound; SF100 fin provides a deeper, lower-volume tone.
Return-style installation – Includes suction-return parts and a recirculation hose to route discharged air back into the intake, supporting smooth drivability.
Sequential pull-type valve – Differential pressure control and pull-type relief ensure stable operation across low to high boost without leakage.
Improved engine bay appearance – SQV IV body is designed to mount beside the engine for a clean, performance-focused look.
Supports stock and tuned setups – Broad operating range suits anything from factory boost to highly modified turbo applications.
Tested for reliability – HKS in-house evaluation reported no engine stalling or related failures.
Technical Specifications
Product: HKS Super SQV Return Plus Blow Off Valve Kit
SKU: 71008-AH008
Vehicle application: Honda S660 2015–2019 (vehicles after Jan 2020 not confirmed)
Valve type: Sequential, pull-type relief
Body material: Silver-coated aluminium die-cast
Valve construction: High-stiffness metal die-cast secondary valve
Sound tuning: Standard triple-fin insert plus SF100 low-frequency fin
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| SKU:
71008-AH008
