Valve Springs and Retainers

Pre-NVCS. 85lb seat pressure at 36.00mm install height. Coil bind at 22.00mm. - NISSAN RB20DET RB25DET. Fits early heads without NVCS. High perform...

83lb at 30.40mm installed height. 10.50mm max lift. - NISSAN RB25DET with NVCS. High performance single valve spring set. Includes 24 springs and 1...

97lb seat pressure at 38.65mm installed height. 190lb at 10.00mm lift. - NISSAN RB25DET NEO. Drop-in parallel spring to suit OEM retainer and base....

100lb seat pressure. 180lb at 10.00mm lift. 11.40mm maximum lift. - NISSAN RB25DET NEO. High performance beehive valve spring set with titanium ret...

NOT suitable for NON VCT or Neo Head. Those heads require the KVS20 kit 83lb seat pressure at 30.40mm installed height. 10.50mm maximum lift. - Nis...