Tomei Valve Guides Nissan RB20DET, RB25DET and RB26DETT

  VALVE GUIDES   ■Material:　5191（Cn-Sn-P alloy） ■Tensile strength:　590～685（Ｎ/㎜2） ■Hardness:　180～230（ＨＢ） APPLICATION IN/EX PART NO. NOTES Made from Phosphor Bronze (PBB) RB26DETT SET TA309A-NS05A IN Only TA309C-NS05A EX Only TA309D-NS05A RB25DE(T) RB20DE(T) SET TA309A-NS06A IN Only TA309C-NS05A EX Only TA309D-NS06A We chose to use Phosphor Bronze (Cn-Sn-P alloy) to make our Valve Guides, for its highly tensile and superior heat transferring ability, which is vital in high power and high RPM outputting engines. Since race engines these days require more power at higher RPM use , these engines now experience more extreme heat conditions. These conditions will increase the deterioration rate on these valve train related components. The Phospho