Nissan VK56 Valve Spring Set KVS56 kseries Vacuum-Based Boost Control also allows

Vacuum-Based Boost Control also allows the setup of advanced gate strategies

They are easily converted to an entire atmospheric or full bypass unit by using supplied port blanking plug

ensuring that the welded flange stays firmly in place

* 12mm or 1/2 inch bolt upgrade is required

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Nissan VK56 Valve Spring Set KVS56 kseries Vacuum-Based Boost Control also allows62lb seat pressure. Maximum lift is 12. 50mm NISSAN VK56DE (T). High Performance PACALOY valve spring. Featuring nano peen and gold nitride surface finishing for superior strength and performance. Suits OEM retainers. 62lb seat pressure. 12. 50mm maximum lift.