911 930 964 914/6 9mm Valve Stem Titanium Valve Spring Retainer Set For Sport / Race Engines (ENG 911 930 9 TI R)

Install These On Your Next Rebuild For Added Insurance On Your High RPM Engines - They Are Stronger Than Stock And Lighter So You Get An Added Bonus Over Stock.  Less Chance Of Damage And Valve Float Titanium Valve Spring Retainer Set For 9mm Valve Stem - For Sport / Race Engines - 1965-1994 Porsche 911 / 914-6 / 930 / 964 / 964 Turbo (965) - Patrick Motorsports USA - Sold As A Set Of 12 Replaces Part Numbers: 901 105 421 04 - Concave Washer (Valve Spring Retainer)  Note: For Use With High Performance Valve Spring Set # 901 105 901 50 HP Also Sold In A Complete Set With Upgraded HD Springs And Valve Spring Seats # ENG 901 105 901 HP PMSAlternate Part Numbers: ENG 911 930 9 TI R / ENG-911-930-9-TI-R / ENG.911.930.9.TI.R / ENG9119309TIR / 901 105 421 04 / 901-105-421-04 / 901.105.421.04 / 90110542104 / 901 105 421 03 / 901-105-421-03 / 901.105.421.03 / 90110542103 / 901 105 421 01 / 901-105-421-01 / 901.105.421.01 / 90110542101