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Stock Diameter Performance Valve Springs

1-Stock-Diameter-Performance-Valve-Springs-HRC 98515Delivers increased valve train stability and performance over OEM springs. Premium chrome silicone, coiled and heat-treated in the finest facilities available. Designed for most performance hydraulic and mild mechanical flat tappet applications. Note: Some have taller installed heights and may require either longer valves or retainers design for greater installed height. Sets of 16.


Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
AMC V8
98636 Dual with Damper 1.514 1.125 .937 .697 Y 130 @ 1.875 330 @ 1.300 348 .670 1.150 97216 97118, 97128 96015/96024
Chevrolet SB
98212 Single with Damper 1.260 .876 NA NA Y 115 @ 1.780 340 @ 1.250 425 .570 1.150 97214 97112, 97132 --
GM Gen III (LS1/2/6)
98115 Inverted Conical Ovate 1.055/1.289 .660/.880 NA NA N 102 @ 1.800 260 @ 1.200 265 .600 1.150 -- 97161 --
Chevrolet BB
98636 Dual with Damper 1.514 1.125 .937 .697 Y 130 @ 1.875 330 @ 1.300 348 .670 1.150 97216 97118, 97128 96015/96024
Chrysler SB
98412 Single with Damper 1.432 1.035 NA NA Y 105 @ 1.680 315 @ 1.175 360 .500 1.125 97216 97118 96005/96034
98432 Dual with Damper 1.437 1.080 1.000 .760 Y 135 @ 1.750 285 @ 1.250 300 .625 1.125 97216 97118, 97128 96005
Chrysler BB
98515 Single with Damper 1.510 1.110 NA NA Y 100 @ 1.880 275 @ 1.380 350 .520 1.300 97216 97110, 97128 96015/96033
98611 Single with Damper 1.539 1.125 NA NA Y 145 @ 1.880 350 @ 1.250 335 .670 1.150 97220 97110, 97128 --
98636 Dual with Damper 1.514 1.125 .937 .697 Y 130 @ 1.875 330 @ 1.300 348 .670 1.150 97216 97118, 97128 96015/96024
Ford SB
98412 Single with Damper 1.432 1.035 NA NA Y 105 @ 1.680 315 @ 1.175 360 .500 1.125 97216 97118 96005/96034
98432 Dual with Damper 1.437 1.080 1.000 .760 Y 135 @ 1.750 285 @ 1.250 300 .625 1.125 97216 97118, 97128 96005
Ford 351W/C/M/400
98515 Single with Damper 1.510 1.110 NA NA Y 100 @ 1.880 275 @ 1.380 350 .520 1.300 97216 97110, 97128 96015/96033
98636 Dual with Damper 1.514 1.125 .937 .697 Y 130 @ 1.875 330 @ 1.300 348 .670 1.150 97216 97118, 97128 96015/96024
Ford FE
98636 Dual with Damper 1.514 1.125 .937 .697 Y 130 @ 1.875 330 @ 1.300 348 .670 1.150 97216 97118, 97128 96015/96024
Ford 429-460
98636 Dual with Damper 1.514 1.125 .937 .697 Y 130 @ 1.875 330 @ 1.300 348 .670 1.150 97216 97118, 97128 96015/96024
Oldsmobile V8
98341 Dual 1.384 1.060 1.060 .804 N 105 @ 1.625 230 @ 1.115 263 .655 .910 -- -- --
98432 Dual with Damper 1.437 1.080 1.000 .760 Y 135 @ 1.750 285 @ 1.250 300 .625 1.125 97216 97118, 97128 96005
Pontiac V8
98341 Dual 1.384 1.060 1.060 .804 N 105 @ 1.625 230 @ 1.115 263 .655 .910 -- -- --
98432 Dual with Damper 1.437 1.080 1.000 .760 Y 135 @ 1.750 285 @ 1.250 300 .625 1.125 97216 97118, 97128 96005

Inverted Conical Valve Springs

2-Inverted-Conical-Valve-Springs-HRC 98115The unique design of the Inverted conical valve springs offer increased harmonic resistance for greater spring stability. This design requires less spring pressure for better valve control. Test have shown more horsepower, high rpm’s and longer life expectancy. This design is well known on GM Gen III (LS1/2/6) applications, but is also great for other applications including Chevrolet small blocks, Chrysler 5.7L Hemi, and many other performance applications. Sets of 16.


Style Lower O.D. Top O.D. Lower I.D. Top I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98115 Inverted Conical Ovate 1.289 1.055 .880 .660 N 102 @ 1.800 260 @ 1.200 265 .600 1.150 -- 97161 --
98113 Inverted Conical 1.280 1.035 .900 .650 N 108 @ 1.800 329 @ 1.265 412 .600 1.150 -- 97161 --
98113 Inverted Conical 1.280 1.035 .900 .650 N 108 @ 1.800 345 @ 1.225 412 .600 1.150 -- 97161 --
98117 Inverted Conical 1.450 1.295 1.014 .859 N 118 @ 1.950 375 @ 1.380 457 .580 1.320 97214 97112/97132 --


Electro Polished Inverted Conical Valve Springs

3-Electro-Polished-Inverted-Conical-Valve-Springs-HRC 98114The unique design of the Inverted conical valve springs offer increased harmonic resistance for greater spring stability. This design requires less spring pressure for better valve control. Manufactured of aircraft-grade chrome silicone, with advanced heat-treating. Springs then receive an advanced electro polished finish and stress relieved. This enhanced finish increases valve spring life and fatigue resistance, for lap after lap consistency. Designed for racing hydraulic and mechanical flat tappet as well as performance hydraulic roller camshafts. Sets of 16.

Style Lower O.D. Top O.D. Lower I.D. Top I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98114 Inverted Conical 1.280 1.035 .900 .650 N 108 @ 1.800 329 @ 1.265 412 .600 1.150 -- 97161 --
98114 Inverted Conical 1.280 1.035 .900 .650 N 108 @ 1.800 345 @ 1.225 412 .600 1.150 -- 97161 --


GM Gen III (LS1/2/6) Dual Valve Springs

4-Gen-III-(LS1-2-6)-Dual-Valve-springs-HRC 98116Specifically designed for GM Gen III LS1, LS2 and LS6 performance applications. Hi-tech winding, heat treat and finishing processes make these the ultimate late model performance spring. Use chrome moly steel retainers #97162.  .640" max lift. Sets of 16.

Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98116 Dual 1.290 .955 .950 .830 N 135 @ 1.800 355 @ 1.150 340 .640 1.100 97165 97162 96023
98118 Dual 1.295 .935 .935 .667 N 148 @ 1.800 413 @ 1.150 407 .660 1.060 97165 -- 96023


Performance Hydraulic Flat Tappet Valve Springs

5-Performance-Hydraulic-Flat-Tappet-Valve-Springs-HRC 98214Howards research and development engineers are constantly updating materials and manufacturing techniques, to provide the best possible valve springs. Coiled and heat-treated in the finest facilities available. Each spring is coiled, stress relieved, deburred, shot-peened and heat treated to our own very specific standards. Sets of 16.

Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98111 Single with Damper 1.240 .860 NA NA Y 90 @ 1.700 240 @ 1.250 335 .520 1.125 97214 97112, 97132 --
98214 Single with Damper 1.250 .870 NA NA Y 115 @ 1.700 300 @ 1.250 411 .500 1.160 97214 97112, 97132 --
98212 Single with Damper 1.260 .876 NA NA Y 115 @ 1.780 340 @ 1.250 425 .570 1.150 97214 97112, 97132 --
98113 Inverted Conical 1.280/1.035 .900/.650 NA NA N 108 @ 1.800 329 @ 1.265 412 .600 1.150 -- 97161 --
98341 Dual 1.384 1.060 1.060 .804 N 105 @ 1.625 230 @ 1.115 263 .655 .910 -- -- 96005/96034
98412 Single with Damper 1.432 1.035 NA NA Y 105 @ 1.680 315 @ 1.175 360 .500 1.125 97216 97118 96005/96034
98436 Dual 1.435 1.055 1.055 .775 N 105 @ 1.680 320 @ 1.180 251 .550 1.075 97216 97118 96005/96033
98438 Dual 1.465 1.091 1.090 .807 N 122 @ 1.650 353 @ 1.100 420 .690 .950 97216 97118, 97128 96005/96033
98411 Single with Damper 1.437 1.080 NA NA Y 100 @ 1.750 235 @ 1.100 202 .640 1.050 97216 97118, 97128 96005/96035
98444 Dual 1.440 1.085 1.080 .810 N 125 @ 1.800 250 @ 1.200 208 .690 1.050 97216 97110, 97128 96005/96034
98511 Single with Damper 1.475 1.061 NA NA Y 105 @ 1.800 300 @ 1.250 355 .590 1.150 97216 97110, 97128 96005
98515 Single with Damper 1.510 1.110 NA NA Y 100 @ 1.880 275 @ 1.380 350 .520 1.300 97216 97110, 97128 96015/96033
98529 Single with Damper 1.525 1.075 NA NA Y 125 @ 1.875 350 @ 1.375 462 .600 1.200 97216 97110, 97128 --
98611 Single with Damper 1.539 1.125 NA NA Y 145 @ 1.880 350 @ 1.250 335 .700 1.030 97220 97110, 97128 --


Performance Hydraulic Roller Valve Springs

6-Performance-Hydraulic-Roller-Valve-Springs-HRC 98442Coiled and heat-treated in the finest facilities available. Howards research and development teams are constantly updating materials and manufacturing.

Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98213 Single with Damper 1.265 .875 NA NA Y 115 @ 1.800 380 @ 1.200 430 .640 1.100 97214 97112, 97132 --
98218 Single with Damper 1.265 .875 NA NA Y 125 @ 1.800 375 @ 1.200 415 .600 1.150 97214 97112, 97132 --
98113 Inverted Conical 1.280/1.035 .900/.650 NA NA N 108 @ 1.800 345 @ 1.225 412 .600 1.150 -- 97161 --
98438 Dual 1.465 1.091 1.090 .807 N 122 @ 1.650 353 @ 1.100 420 .690 .950 97216 97118, 97128 96005/96033
98432 Dual with Damper 1.437 1.080 1.000 .760 Y 135 @ 1.750 285 @ 1.250 300 .625 1.125 97216 97118, 97128 96005
98442 Dual 1.437 1.080 1.080 .810 N 145 @ 1.750 315 @ 1.150 283 .665 1.025 97216 97118, 97128 96005/96035
98443 Dual 1.440 1.085 1.080 .796 N 145 @ 1.880 325 @ 1.250 286 .670 1.150 97216 97118, 97128 96005
98445 Dual 1.460 1.080 1.085 .840 N 120 @ 1.875 425 @ 1.110 399 .735 1.080 97216 97118, 97128 96005/96024
98542 Dual 1.480 1.095 1.090 .800 N 110 @ 1.880 345 @ 1.320 420 .550 1.270 97216 97118, 97128 96015/96033
98512 Dual 1.514 1.135 1.135 .795 N 145 @ 1.900 335 @ 1.300 348 .700 1.150 97220 97118, 97128 96015/96033
98611 Single with Damper 1.539 1.125 NA NA Y 145 @ 1.880 350 @ 1.250 335 .700 1.030 97220 97110, 97128 --
98632 Dual with Damper 1.539 1.125 1.000 .760 Y 140 @ 1.940 425 @ 1.250 413 .730 1.150 97220 97118, 97128 96015/96035


Performance Mechanical Flat Tappet Valve Springs

7-Performance-Mechanical-Flat-Tappet-Valve-Springs-HRC 98611Manufactured of aircraft chrome silicone material. Coiled and heat-treated in the finest facilities available. Each spring is coiled, stress relieved, deburred, shot-peened and heat treated to our own very specific standards. Howards research and development engineers are constantly updating materials and manufacturing techniques, to provide the best possible valve springs. Sets of 16.

Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98214 Single with Damper 1.250 .870 NA NA Y 115 @ 1.700 300 @ 1.250 411 .500 1.160 97214 97112, 97132 --
98212 Single with Damper 1.260 .876 NA NA Y 115 @ 1.780 340 @ 1.250 425 .570 1.150 97214 97112, 97132 --
98213 Single with Damper 1.265 .875 NA NA Y 115 @ 1.800 380 @ 1.200 430 .640 1.100 97214 97112, 97132 --
98218 Single with Damper 1.265 .875 NA NA Y 125 @ 1.800 375 @ 1.200 415 .600 1.150 97214 97112, 97132 --
98437 Dual with Damper 1.435 1.035 .937 .697 Y 135 @ 1.680 360 @ 1.190 455 .575 1.055 97216 97118, 97128 96015/96024
98438 Dual 1.465 1.091 1.090 .807 N 122 @ 1.650 353 @ 1.100 420 .690 .950 97216 97118, 97128 96005/96033
98444 Dual 1.440 1.085 1.080 .810 N 125 @ 1.800 250 @ 1.200 208 .690 1.050 97216 97110, 97128 96005/96034
98432 Dual with Damper 1.437 1.080 1.000 .760 Y 135 @ 1.750 285 @ 1.250 300 .625 1.125 97216 97118, 97128 96005
98442 Dual 1.437 1.080 1.080 .810 N 145 @ 1.750 315 @ 1.150 283 .665 1.025 97216 97118, 97128 96005
98443 Dual 1.440 1.085 1.080 .796 N 145 @ 1.880 325 @ 1.250 286 .670 1.150 97216 97118, 97128 96005
98445 Dual 1.460 1.080 1.085 .840 N 120 @ 1.875 425 @ 1.110 399 .735 1.080 97216 97118, 97128 96005
98511 Single with Damper 1.475 1.061 NA NA Y 105 @ 1.800 300 @ 1.250 355 .590 1.150 97216 97110, 97128 96005
98542 Dual 1.480 1.095 1.090 .800 N 110 @ 1.880 345 @ 1.320 420 .550 1.270 97216 97118, 97128 96015/96033
98515 Single with Damper 1.510 1.110 NA NA Y 100 @ 1.880 275 @ 1.380 350 .520 1.300 97216 97110, 97128 96015/96033
98636 Dual with Damper 1.514 1.125 .937 .697 Y 130 @ 1.875 330 @ 1.300 348 .670 1.150 97216 97118, 97128 96015/96024
98611 Single with Damper 1.539 1.125 NA NA Y 145 @ 1.880 350 @ 1.250 335 .700 1.030 97220 97110, 97128 --
98632 Dual with Damper 1.539 1.125 1.000 .760 Y 140 @ 1.940 425 @ 1.250 413 .730 1.150 97220 97118, 97128 96015/96035


Electro Polished Performance Valve Springs

8-Electro-Polished-Performance-Valve-Springs-HRC 98215Manufactured of aircraft-grade chrome silicone, with advanced heat-treating. Outers then receive an advanced electro polished finish and stress relieved.

Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98215 Single with Damper 1.265 .875 NA NA Y 115 @ 1.800 380 @ 1.200 430 .640 1.100 97214 97112, 97132 --
98114 Inverted Conical 1.280/1.035 .900/.650 NA NA N 108 @ 1.800 345 @ 1.225 412 .600 1.150 -- 97161 --
98415 Single with Damper 1.437 1.080 NA NA Y 110 @ 1.750 270 @ 1.100 246 .640 1.050 97216 97118, 97128 96005/96035
98433 Dual with Damper 1.437 1.080 1.000 .760 Y 135 @ 1.750 285 @ 1.250 300 .625 1.125 97216 97118, 97128 96005
98447 Dual 1.437 1.080 1.080 .810 N 145 @ 1.750 315 @ 1.150 283 .665 1.025 97216 97118, 97128 96005
98656 Dual with Damper 1.514 1.125 .937 .697 Y 130 @ 1.875 330 @ 1.300 348 .670 1.150 97216 97118, 97128 96015
98513 Dual 1.514 1.135 1.135 .795 N 145 @ 1.900 335 @ 1.300 348 .700 1.150 97220 97118, 97128 96015/96033
98612 Single with Damper 1.539 1.125 NA NA Y 145 @ 1.880 350 @ 1.250 335 .670 1.150 97220 97110, 97128 --
98652 Dual with Damper 1.539 1.125 1.000 .760 Y 140 @ 1.940 425 @ 1.250 413 .730 1.150 97220 97118, 97128 96015/96035


Max Effort™ Mechanical Roller Valve Springs

9-Max-Effort™-Mechanical-Roller-Valve-Springs-HRC 98634Howards™ Cams competition racing valve springs are CNC coiled and heat-treated in the finest facilities available. Using only the highest quality valve spring.

Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98441 Dual 1.437 1.080 1.080 .796 N 175 @ 1.750 400 @ 1.150 375 .625 1.050 97220 97128 96005/96033
98431 Dual with Damper 1.437 1.080 1.015 .731 Y 200 @ 1.700 390 @ 1.250 380 .580 1.150 97220 97128 96005/96031
98541 Dual 1.500 1.116 1.116 .800 N 180 @ 1.800 435 @ 1.250 475 .700 1.040 97220 97118, 97128 96015/96033
98634 Dual with Damper 1.557 1.143 1.000 .760 Y 175 @ 1.950 440 @ 1.250 380 .740 1.150 97220 97118, 97128 96010/96031
98633 Dual with Damper 1.557 1.143 1.015 .731 Y 200 @ 1.950 540 @ 1.250 486 .740 1.150 97220 97118, 97128 96010/96031
98630 Dual with Damper 1.539 1.125 1.015 .731 Y 194 @ 1.920 505 @ 1.200 510 .720 1.150 97220 97118, 97128 96015/96031
98635 Dual with Damper 1.557 1.143 1.033 .749 Y 225 @ 1.950 555 @ 1.250 471 .740 1.150 97220 97118, 97128 96010/96031
98732 Dual with Damper 1.635 1.185 1.065 .769 Y 182 @ 1.940 690 @ 1.200 689 .780 1.100 97222 97130 96020/96040


Electro Polished Max Effort™ Mechanical Roller Valve Springs

10-Electro-Polished-Max-Effort™-Mechanical-Roller-Valve-Springs-HRC 98650Manufactured of aircraft-grade chrome silicone, with advanced heat-treating. Outers then receive an advanced electro polished finish and stress relieved. This enhanced finish increases valve spring life and fatigue resistance, for lap after lap consistency. Designed for mechanical applications. Sets of 16.

Style Outer O.D. Outer I.D. Middle O.D. Middle I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98643 Dual 1.540 1.126 1.126 0.814 N 230 @ 1.880 550 @ 1.250 508.000 0.75 1.08 97220 97118, 97128 96015/96034
98737 Dual with Damper 1.625 1.174 1.06 0.768 Y 240 @ 2.000 685 @ 1.250 593.000 0.8 1.15 97222 97130 96020/96035
98738-A Dual 1.640 1.210 0.875 0.86 N 250 @ 2.000 800 @ 1.150 645.000 0.88 1.07 97222 -- 96020/96034
98048 Triple 1.660 1.210 1.205 .885 0.855 0.65 N 350 @ 2.100 1020 @ 1.200 745.000 0.895 1.145 97224 -- --
98049 Triple 1.660 1.215 1.190 .875 0.875 0.635 N 350 @ 2.200 1075 @ 1.200 725.000 0.995 1.145 97224 -- --


Electro Polished Pro-Alloy Mechanical Roller Valve Springs

12-Electro-Polished-Pro-Alloy-Mechanical-Roller-Valve-Springs-HRC 98637When only the best will do! Howards Cams™ took their state-of-the-art Pro-Alloy roller valve springs one step further. Each of these springs are electro polished, which enhances the material even further. By reducing localized stress areas, these springs offer even greater life expectancy. Each spring is coiled using the most advance CNC winders in the industry. Each spring is then parallel ground, stress relieved and deburred. They are then shot-peened and heat-treated to our own very specific standards. These high standards are what it takes for a longer spring life, even in rough racing environments. Unconditionally Guaranteed against breakage for one year! Just return the broken spring and we’ll replace it, no questions asked. Sets of 16.

Style Outer O.D. Outer I.D. Middle O.D. Middle I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98644 Dual 1.540 1.126 1.126 0.814 N 230 @ 1.880 550 @ 1.250 508.000 0.75 1.08 97220 -- 96015/96034
98637 Dual with Damper 1.540 1.115 1.025 0.729 Y 225 @ 1.950 600 @ 1.230 521.000 0.7 1.19 97220 -- 96015/96031
98638 Dual with Damper 1.540 1.114 1.025 0.721 Y 230 @ 2.100 620 @ 1.380 542.000 0.72 1.380 97220 -- 96015/96030
98745 Dual with Damper 1.625 1.174 1.06 0.768 Y 240 @ 2.000 685 @ 1.250 593.000 0.8 1.15 97222 -- 96020/96040
98739 Dual 1.640 1.210 0.875 0.86 N 250 @ 2.000 800 @ 1.150 645.000 0.88 1.07 97222 -- 96020/96034
98853 Triple 1.750 1.225 1.205 .900 0.89 0.649 N 370 @ 2.250 1110 @ 1.200 705.000 1 1.15 -- -- --


Pro Endurance™ Mechanical Roller Valve Springs

13-Pro-Endurance™-Mechanical-Roller-Valve-Springs-HRC 98885Consistent run after run, lap after lap. Specifically designed to last under the toughest racing environments, including Drag Race, Oval Track and Endurance applications. Special materials, winding process and heat treatment are what makes these true high endurance masterpieces. Fully tested to rev higher, live longer and run harder. Sets of 16.

Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98885 Dual 1.560 1.150 1.145 .740 N 245 @ 2.000 600 @ 1.300 507 .740 1.200 97213 -- 96010/96031
98895 Dual with Damper 1.570 1.135 1.130 .740 Y 245 @ 2.030 620 @ 1.300 514 .770 1.200 97216 -- 96031


REM Polished Pro Endurance™ Mechanical Roller Valve Springs

14-REM-Polished-Pro-Endurance™-Mechanical-Roller-Valve-Springs-HRC 98896REM polishing is a process designed to remove the peaks and valleys of the material. This is done after the CNC winding and heat-set. Benefits include less part wear and contact fatigue, reduced friction and vibration and lower valve spring temperatures. Perfect for Oval Track, Road Race and all other Endurance applications. Special materials, winding process and heat treatment are what makes these true high endurance masterpieces. Tested to rev higher, live longer and run harder. Sets of 16.

Style Outer O.D. Outer I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer Seat Cup/Locator
98896 Dual with Damper 1.570 1.135 1.130 .740 Y 245 @ 2.030 620 @ 1.300 514 .770 1.200 97216 -- 96031


Pro-Series H-11 Tool Steel Valve Springs

15-Pro-Series-H-11-Tool-steel-Valve-Springs-HRC 98645Pro-Series H-11 springs are designed for the serious racer. Manufactured with the latest in laser technology. Each spring is manufactured using the most advance CNC winders in the industry. Each spring is parallel ground, stress relieved and deburred. They are then shot-peened and heat-treated to very specific standards. Inspected and batched to zero tolerance for the ultimate precision valve spring. This is the next generation tool steel spring! Sets of 16.

Style Outer O.D. Outer I.D. Middle O.D. Middle I.D. Inner O.D. Inner I.D. Damper Closed Pressure Open Pressure Rate Max Lift Coil Bind Titanium Retainer Steel Retainer
98645 Dual 1.550 1.100 0.995 0.725 N 225 @ 1.850 675 @ 1.150 644.000 0.7 1.09 97216 -- 96015/96030
98751 Triple 1.625 1.190 1.185 .890 0.88 0.67 N 250 @ 2.000 680 @ 1.250 570.000 0.85 1.1 97225 -- 96020
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