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I need to know what bulb size is for directionals in the TYC, and MORE IMPORTANTLY, do they make a single filament replacement, so my directionals dont come on with my parking lights?????
I believe there 7443, if so are 7440 the single filament replacements?

 
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the tyc's use a t20 base i believe...as for single filament replacements for those, i dont know either.

 
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t20 for parking or turn signal? I've never heard of a t20

 
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http://superlumination.com/7443_7440.htm

scroll down to "7443 7440 t20 wedge base"

 
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i think t20 is just the base designation for the 7440 and 7443 bulbs right???

 
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anyone???

 
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#3457KNA

directly off the back of the tyc housing.

 
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3457? never heard of that bulb, are you sure it's not 3157, or 3057?

 
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BTW these are for TYC headlights, not tailights, sorry I didn't mention that before.

 
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#3457kna. as previously stated, this number is directly off of the back of the tyc headlight housings.

 
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check out this link:

link to bulbs

scroll down to "25 led"

under the application it says "3157 = 3057 3155 3357 3457 4157"

so Im wondering if all these bulbs are the same?