HKS SSQV4 Blow Off Valve Return Kit for 23-26 Civic Type R

HKS SSQV Return Kit - 2023+ Honda Civic Type R (FL5)

The stock bypass valve on your FL5 Type R works but you can't hear it and you can't see it. You're running 22 PSI of boost and the only thing you hear is the turbo spooling. HKS's Super Sequential Blow Off Valve (SSQV4) kit gives you the sound and the presence the FL5 deserves. This is a complete kit with everything you need to replace the OEM bypass valve. The SSQV4 valve, all the hoses, clamps, fittings, and the suction return line that routes the vented air back into the intake. You're hearing that crisp high-pitched SSQV sound every time you lift off the throttle but you're not venting to atmosphere so you're staying emissions-compliant. This is part number 71008-AH012V and it's designed specifically for the FL5. It's not a universal kit with adapters. HKS built this for the K20C1 turbo setup.

Here's Why the SSQV4 Works Better Than a Spring-Loaded BOV

Most blow off valves use a spring. You set the spring preload for a specific boost level. If you're running 15 PSI, you adjust the spring so it opens at 15 PSI. If you turn the boost up to 25 PSI later, you're readjusting the spring or the valve won't open properly. HKS's SSQV4 doesn't use spring preload. It uses a sequential valve structure with a differential pressure control system. The valve opens based on the pressure differential between the charge pipe and the intake manifold vacuum signal. It works from low boost to high boost without adjustment. You're at 10 PSI on a mild pull? It opens. You're at 22 PSI hammering on it? It opens. You turn the boost up to 25 PSI next year? It still works. No spring adjustment. No retuning the valve. It just works across the entire boost range.

Pull-Type Vacuum Operation Instead of Push-Type Pressure

The SSQV4 is a pull-type valve. When you lift off the throttle, the intake manifold goes into vacuum. That vacuum signal pulls the valve open and vents the pressure from the charge pipe. Most cheap blow off valves are push-type. The boost pressure pushes the valve open against a spring. The problem with push-type valves is the operation's inconsistent. At low boost the valve barely opens. At high boost it slams open. The SSQV4's pull-type design keeps the operation smooth and consistent at any boost level. The valve opens cleanly every time you lift. You're getting that signature SSQV sound and you're protecting your turbo from compressor surge.

Recirculated Setup - Not Venting to Atmosphere

This kit includes a suction return line that routes the vented air back into the intake tract before the turbo. That's recirculation. The valve's venting pressure but it's not dumping it into the atmosphere. You're hearing the SSQV sound but you're not screwing up your MAF sensor readings or failing emissions. This matters if you're daily driving the car or if you live somewhere with emissions testing. Venting to atmosphere on a MAF-based car causes the ECU to see rich conditions because it measured the air going in but that air's now gone. You get rough idle, surging, and check engine lights. Recirculated setups avoid all of that. The air loops back into the intake and the MAF reading stays accurate. You get the sound. The car runs right. No codes.

FL5-Specific Fitment - Not a Universal Kit

This is part number 71008-AH012V and it's designed specifically for the FL5 Civic Type R. HKS engineered this kit for the K20C1 turbo setup in the FL5. The mounting location's correct. The hose lengths are correct. The fittings match the FL5 plumbing. You're not buying a universal SSQV4 and trying to make it fit with adapters and custom hoses. It bolts into the factory location and connects to the existing charge piping. If you've got an FK8 (2017-2021 Type R), this kit doesn't fit. The FK8 has a different layout and uses a different HKS kit (part number 71008-AH009). Make sure you're ordering the right one for your chassis.

What You Get

• HKS Super Sequential Blow Off Valve (SSQV4) kit for FL5 Civic Type R - part number 71008-AH012V
• SSQV4 valve head unit (sequential valve structure, differential pressure control, pull-type operation)
• Suction return line (recirculates vented air back into intake - not atmosphere vent)
• All hoses, clamps, and fittings needed for installation
• Complete bolt-on kit (replaces OEM bypass valve)
• No spring adjustment required (works across full boost range)
• High-pitched crisp SSQV release sound
• Made by HKS

Fits This Car

• 2023-2026 Honda Civic Type R (FL5 chassis, K20C1 2.0T engine)

Note: This is part number 71008-AH012V designed specifically for the FL5 Civic Type R (2023+) - does NOT fit FK8 Civic Type R (2017-2021). FK8 uses different layout and requires different HKS kit (71008-AH009). Complete kit includes SSQV4 valve, suction return line, and all hoses/clamps/fittings (everything needed for installation). Recirculated setup (not atmosphere vent) - vented air routes back into intake tract via suction return line for proper MAF operation. Sequential valve structure with differential pressure control works across full boost range (low to high boost) without spring adjustment - no need to retune valve if you change boost levels. Pull-type vacuum operation (intake manifold vacuum pulls valve open) for consistent smooth operation at any boost level vs. push-type valves that slam open inconsistently. Replaces OEM bypass valve, bolts into factory location and connects to existing charge piping. High-pitched crisp SSQV release sound every time you lift off throttle. Protects turbo from compressor surge. No check engine lights or MAF issues (recirculated setup maintains accurate MAF readings). Professional installation recommended.