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Automotive

Pertronix 9LU-147A Ignitor II Adaptive Dwell Control for Lucas 4 Cylinder

Automotive3.9· 29 Amazon ratings

Bias-adjusted across 29 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Automotive.

21.6%
Percentile · Global
20.8%
Percentile · Cohort
Automotive
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Pertronix 9LU-147A Ignitor II Adaptive Dwell Control for Lucas 4 Cylinder

How the score was built

Amazon ratings
29

used for the Bayesian percentile

Raw star average
3.9 / 5

unadjusted Amazon mean

Bayesian avg
4.20

raw rating shrunk to the category prior

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Same category · Automotive

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