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NexTek Series Valve Springs High Performance Street/Strip Valve Springs You can't beat Manley's NexTek valve springs for winning performance, long term reliability and ultimate value! No degradation of spring pressure in the later stages of a race. Spring ID's are chamfered for retainer clearance. Specially processed premium grade chrome silicon that's virtually free of impurities or surface irregularities. State of the art winding, thermal treatment and finishing practices that cannot be duplicated. NexTek Series Valve Springs have been tested by leading engine builders and are confirmed to be the best performance valve springs on the market today.

Part # Description Max Valve Lift OD ID Installed/Open Pressure Rate (lbs/in) Coil Bind Price/ Set 221423-16 SBC LS-1 LT-1/LT-4/L-98 Stock Dia. Street/Strip single w/o damper Ovate wire .575 1.255 .830 115 @ 1.750 350 @ 1.175 409 1.100 $165 221428-16 SBC LS-1 LT-1/LT-4/L-98 Stock Dia. Street/Strip single Conical Ovate wire .600 1.076 Top 1.311 Bottom .650 Top .885 Bottom 150 @ 1.800 355 @ 1.200 341 1.085 $195 221436-16 SBC LS-1 High. Perf. Street/Strip Fully Polished Double w/o Damper .660 1.295 .676 155 @ 1.810 405 @ 1.150 379 1.100 $189 221430-16 Chrysler HEMI 5.7L, 6.1L ** Stock Dia. High. Perf. Street/Strip Fully Polished Single Conical Ovate Wire .600 1.056 Top 1.206 Bottom .630 Top .780 Bottom 130 @ 1.811 360 @ 1.236 400 1.170 $239 221427-16 Ford 4.6L, 5.4L SOHC 2V per Cyl. Stock Dia. Ideal for Boosted Apps single Conical Ovate wire .580 1.020 Top 1.125 Bottom .642 Top .748 Bottom 95 @ 1.680 240 @ 1.130 264 1.080 $239 221437-16 Ford 4.6L, 5.4L SOHC 2V per Cyl. Stock Dia. Street/Strip single Conical Ovate wire .580 1.030 Top 1.175 Bottom .642 Top .787 Bottom 125 @ 1.680 265 @ 1.130 255 1.080 $239 221429-24 Ford 4.6L, 5.4L SOHC 3V per Cyl. Stock Dia. Street/Strip Fully Polished Single Conical .500 .880 Top 1.025 Bottom .565 Top .710 Bottom 95 @ 1.670 230 @ 1.170 270 1.100 $272 221434-32 Ford 4.6L, 5.4L SOHC 4V per Cyl. Stock Dia. High. Perf. Street/Strip single Conical Ovate wire .525 1.016 Top 1.126 Bottom .640 Top .750 Bottom 95 @ 1.420 260 @ .920 330 880 $419

** Chrysler HEMI springs come with shims which are ONLY needed for the 6.1L applications on the intake side in order to achieve the correct installed heights.

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