26942 fits applications near a 1.750" installed height and a spring pocket of 1.440". A 350 lbs/in rate and 338 lbs of open load are suitable for many applications.
26924 fits applications up to a 1.900" installed height and a spring pocket of 1.520". It has a 375 lbs/in rate and a 421 lbs open load for controlling heavier valve trains.
26987 fits applications near a 1.800" installed height and a spring pocket of 1.442". It has a 391 lbs/in rate and a 355 lbs open load for many street roller or flat tappet applications.
26929 fits applications near a 1.900" installed height and a spring pocket of 1.560". It has a 400 lbs/in rate and a 440 lbs open load for controlling heavier valve trains
26094 fits applications near a 1.950" installed height and a spring pocket of 1.555". It has a 500 lbs/in rate and a 526 lbs open load for controlling heavier valve trains.