Performance M
Genuine HKS Super SQV4 SSQV4 Universal Blow Off Valve BOV - Turbo Dump/Diverter Valve, Sequential Pull-Type Anti-Surge Pressure Relief, VTA or Recirc (Plumb-Back) Ready, HKS SQV Flange Compatible, JDM Turbocharger Upgrade
Genuine HKS Super SQV4 SSQV4 Universal Blow Off Valve BOV - Turbo Dump/Diverter Valve, Sequential Pull-Type Anti-Surge Pressure Relief, VTA or Recirc (Plumb-Back) Ready, HKS SQV Flange Compatible, JDM Turbocharger Upgrade
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Authentic HKS SQV4 Super Sequential Turbo Pressure Relief Valve
Looking for a proven turbocharger pressure release solution that keeps boost control sharp and your compressor safe from surge? The HKS SQV4 delivers fast venting, razor‑clean gearshift transitions and the distinctive HKS sound enthusiasts love, all wrapped in a robust, long‑life assembly. This is the genuine HKS sequential pull design trusted by tuners worldwide for consistent performance from light throttle to high boost.
Why this HKS sequential valve is the upgrade your build deserves
- Anti‑surge protection that helps safeguard your turbo’s bearings and compressor wheel
- Sequential pull mechanism with boost‑assisted closing force for rock‑solid sealing at elevated pressure
- Rapid response for crisper shifts and improved throttle modulation between gears
- Iconic HKS chirp under lift‑off and smooth vent control to reduce flutter
- Nickel‑finished cast body with stainless hardware for durability and corrosion resistance
- Fits the established HKS pattern flange and accepts legacy SQV inserts plus plumb‑back adapters
- Flexible setup options: atmospheric vent or return‑to‑intake configuration with the appropriate adapter
Compatibility and setup
Universal fit for turbocharged petrol applications. Designed to mount on the HKS SQV style interface, making it easy to replace older SQV units or integrate into charge pipes with an HKS‑type flange. Works brilliantly on MAP‑based systems in atmospheric form. For MAF‑equipped cars, we recommend a plumb‑back configuration for stable fuelling and drivability.
Tuner‑proven performance
We run the SQV4 on our own builds and customer cars and it has been consistently praised for reliability, fast actuation and that unmistakable HKS character. It is a high‑quality, no‑compromise pressure relief solution for serious street and track projects.
Professional fitting available
Want it installed correctly first time with leak‑free results and proper vacuum routing? Book your installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.
Search terms to help you find the right part
HKS SQV4 sequential valve. Turbocharger pressure relief. Anti surge valve. Boost release valve. Charge pipe valve upgrade. HKS pattern flange valve. Sequential pull design. JDM tuning valve. Atmospheric vent valve. Plumb back adapter compatible. Compressor surge prevention. Turbo whoosh valve. Performance diverter alternative. HKS SQV insert compatible. Return‑to‑intake option. Intercooler pipe valve. Turbo vent to atmosphere. Motorsport grade valve. Genuine HKS sequential unit.
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