Subaru VF34 Single Scroll Turbo Competition Restrictor Size Options:40mm whereas the standard 4 spring

whereas the standard 4 spring disc version is better suited to road use as they deliver smooth engagement and disengagement

but at the same time it mechanically damages the valve train and gains added friction loss

No other valve cover kit available does this

The Hybrid Racing swivel neck thermostat housing is machined from billet aluminium and finished in a high quality black anodised coating

Subaru VF34 Single Scroll Turbo Competition Restrictor Size Options:40mm whereas the standard 4 springThis is a Genuine Subaru VF34 Single Scroll Turbo. It's great all round turbo suitable for running in higher powered applications and having a roller bearing core means it is also suitable for competition purposes. We can also supply with a custom restrictor fitted to meet your technical regulations.