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Automotive

Performance Ignition Coil + CDI + Spark Plug + Red Filter GY6 50cc - 90cc 110cc 125cc 150cc 4-stroke Engine Scooter ATV Go Kart Moped Quad Pit Dirt Racing Bike 139QMB 152QMI 157QMJ

Automotive4.6· 62 Amazon ratings

Bias-adjusted across 62 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Automotive.

75.4%
Percentile · Global
79.5%
Percentile · Cohort
Automotive
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Performance Ignition Coil + CDI + Spark Plug + Red Filter GY6 50cc - 90cc 110cc 125cc 150cc 4-stroke Engine Scooter ATV Go Kart Moped Quad Pit Dirt Racing Bike 139QMB 152QMI 157QMJ

How the score was built

Amazon ratings
62

used for the Bayesian percentile

Raw star average
4.6 / 5

unadjusted Amazon mean

Bayesian avg
4.41

raw rating shrunk to the category prior

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Same category · Automotive

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