> Products > TUNE-UP KIT FLATHEAD KNUCKLEHEAD 1930-1947 D21 PLUGS
TUNE-UP KIT FLATHEAD KNUCKLEHEAD 1930-1947 D21 PLUGS

TUNE-UP KIT FLATHEAD KNUCKLEHEAD 1930-1947 D21 PLUGS

$ 26.00

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After Years Of Trying Most Expensive To Least Expensive Components
This Kit Offers The Best Value And Performance For Your Stock Flathead Knucklehead
6-Volt Or 12-Volt
For Most Accurate Results Use A Wire Feeler Gauge
Basic Settings
Spark Plug Gap = .025 - .030
Champion D21
Point Gap = .022 Manual Advance

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