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The 3157 is a clear bulb and the 3157NA is an amber color.
For all practical purposes, they are interchangeable. To my eye the 3357 seeems to be brighter on the heavier filament. (brake/turn)
Tail and stop bulb = 3057 Park and turn bulb = 3157NAK
difference between as on and as at
tail/stop/turn signal bulb # 3057 park/turn signal bulb # 3157NA
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Difference between paging and what?
difference between enterprise and corporation
The difference between a shogun and a samurai is like the difference between a king and a knight.
difference between enterprise and corporation
just difference