PAC 1204X RPM SERIES DUAL VALVE SPRINGS 5 Minimum Roller 4000-7500 Oval

5 Minimum              Roller            4000-7500             Oval Track / Drag Race With Nitrous

These are the most affordable high quality aluminum cylinder heads on the market

BB-2 XTRA         365 cc    119 cc     2

300      0

V6 -8   194 cc        67 cc           2

PAC 1204X RPM SERIES DUAL VALVE SPRINGS 5 Minimum Roller 4000-7500 OvalCALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. O. D. Large End I. D. Large End O. D. Small End I. D. Small End Installed Height (Valve Closed) Open Valve (Valve Open) Spring Rate Max Coil Bind Max Lift Titanium Retainers Steel Retainers Spring Seats Price 1. 29 0. 95 No 0. 694 145 @ 1. 800 385 @ 1. 150 369 1. 000 0. 700 PAC R435 PAC R335 PAC S129 N A RPM Series Dual LS Engine Spring $285. 76 Price per 16. American made chrome silicone double drag