The best replacement for turbochargers is superchargers.

The best alternatives to turbochargers are rated as following:
★★★★★  superchargers

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Speaking about turbochargers, one probably shouldn't forget about intercoolers.

Other search terms related to turbochargers and their ratings are:
★★★★★ intercoolers
You have in mind a companion for turbochargers and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of turbochargers in all years. Click on graph for more.
turbochargers
superchargers