Air and Fuel› Superchargers, Turbochargers and Components

HKS Super

Super SQV4 Blow Off Valve Kit

$1,540.00

SKU: 71008-AN030

Special Order
Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The HKS Super SQV4 Blow Off Valve Kit is a sequential blow-off valve employing a unique two-stage sequential valve structure and a differential pressure control system. This system delicately manages pressure across a wide operating range from low to high boost. It features dedicated 4-ply silicone hoses and a molded silicone return hose for a snug fit.
Show original supplier description
The HKS Super SQV4 (Sequential Blow-Off Valve) employs a unique two-stage sequential valve structure with primary and secondary valves, managed by a differential pressure control system. This design allows for delicate pressure management across a wide operating range, from low to high boost. Unlike typical blow-off valves, the SQV4's "relief-less operation system" suppresses relief at high boost. This maximizes charge response during repeated boost and release cycles with throttle ON/OFF. For the VR30DDTT engine, blow-off valves are placed on both banks to quickly release unnecessary boost pressure from each turbocharger, reducing their load when the throttle is off. The kit includes dedicated 4-ply silicone hoses to replace the stock hoses between the turbocharger and intercooler, strengthening this section. All parts except the SQV4 main body are black to highlight the valve itself. The return hose uses a dedicated molded silicone hose, ensuring a snug fit in the engine bay. This specific kit (71008-AN030V) is engineered for the 2023-2025 Nissan Z (RZ34) equipped with the VR30DDTT engine. Installation typically takes approximately 3 hours.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandHKS Super
Part Number71008-AN030
CategoryAir and Fuel
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Returns & Fitment

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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