The best replacement for solid cam is hydraulic cam.

The best alternatives to solid cam are rated as following:
★★★★★  hydraulic cam
★★  hydraulic
★★  roller cam
★  master cam
  hydraulic roller cam

Your alternative for solid cam is not listed? Suggest!
Speaking about solid cam, one probably shouldn't forget about hydraulic lifters.

Other search terms related to solid cam and their ratings are:
★★★★★ hydraulic lifters
★★★★ hydraulic lifter
You have in mind a companion for solid cam and it is not yet here? Propose!



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solid cam
hydraulic cam
hydraulic