Had all 4 coils come with a speedster chassis, they all seem to buzz at the same frequency but I am sure they need to be adjusted.
I used them to get my chassis running but will be moving to a distributor.
See the album for all the photos of the coils and box.
Box was re-assembled with a mid range kit.
Coils work on battery and mag without issue.
I am guessing they are refurbed units from Snyder.
If you cannot see either please let me know. Respond here or email barchockATgmailDOTcom
$250 plus shipping
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