RB25 DET Heavy Duty Valve Springs + Tit Retainers

** As Used by Australia's leading Workshops - your guarantee of performance and reliability **

These PRO SPRINGS and TITANIUM RETAINERS suit the Nissan RB25 DET Twin Cam engine. Suitable for both NA and Turbo.

These springs are highly recommended for applications over 300rwkw , to help eliminate valve float. Valve float causes damage to valve stem seals and collets and retainers.

Once installed, a much more powerful and free revving top end power curve is possible. OEM valve springs have approx 50 psi seat pressure, once 15 psi is added to this equation (which acts against the valve spring), approximately only 35 psi seat pressure is left. This is nowhere near enough to keep the valves closed at high rpms.

FEATURES :

• New and Improved design
• Direct replacement for the OEM spring - straight drop in
• Drop in Titanium Retainers
• OEM retainers can be retained
• NITRIDE TREATED and shot peened Spring.
• 84Lbs seated approx - Can be Shimmed to increase 

Premium quality - Quality Aussie made Drop in valve spring.