4157NA = 3157 ?

Is a 4157NA bulb the same as a 3157? Every time I search for 4157NA it brings up 3157 bulbs.

 

The 3157 and 4157 are different only in their longevity. The 4000 series is a new bulb containing Krypton gases and apparently have up to 4 times the longevity of the 3000 equivalents. According to Sylvania

 

Thanks.

 

Anytime

 

This guy bulbs

 

If you are searching for LEDs, don't buy Sylvania. Also, if you're planning on installing LEDs, you need to know the difference between CK and non CK.

 

Which does the front turn signals use and which LED should I use? I purchased JDMastar for fog lights..

 

Front turn signals are CK. Rear tail/brake lights are NOT CK. Rear turn signals don't matter since there's only 2 contacts in the socket. JDMaster is awesome to deal with.

Some LEDs are too long to fit in the front turn signals. JDMaster knows what will fit in the Taco.