The best replacement for 5.9 is 6.7.

The best alternatives to 5.9 are rated as following:
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★  5.7
★  6.7 dodge diesel
★  5.9ho
★  hemi 5.7
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  ford 5.4
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  5.2 dodge

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Speaking about 5.9, one probably shouldn't forget about dead aim.

Other search terms related to 5.9 and their ratings are:
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5.9
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