The HKS Racing SQV Blow Off Valve is available with their original 3-chamber structure that ensures the stable operation regardless of the amount of pressure. The large 51mm valve performs great with high power and large displacement engines. It features an adjustable pre-load that allows for a wide range of applications.
Features
- HKS 3 Chamber Design
- 51mm Valve
Notes
- This kit is a general-purpose main unit. It comes with a mounting flange, but it must be welded to a pipe, etc. A separate hose for piping is required. The size is different from the conventional Super SQV mounting flange.
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HKS was founded in October 1973 by Hiroyuki Hasegawa, a former Yamaha engineer, and Goichi Kitagawa, with start-up capital from Sigma Automotive; the name comes from Hasegawa, Kitagawa and Sigma. It began in a small shed at the foot of Mount Fuji, in Fujinomiya, Shizuoka, and is still based there.
In 1974 HKS built one of the first bolt-on turbo kits, for the Nissan L20 engine in the Skyline, raising output from 115 to 160 PS. Turbocharging made its name; today it also makes exhausts, springs, shocks and coilover suspension, and it marked its 50th anniversary in 2023.










