my friend with a scion tc changed his front signal bulbs from the normal amber bulb to a brighter white bulb to match his hids. I was thinking about doing the same thing on the impala but ive been having trouble finding anything but standard replacement bulbs. i know its a 4157NA bulb. if anyone has any information about bulbs it would help alot. thanks

 

you can use a 3157na. ive got red bulbs in my turns up front.

 

you could use a 4157 with out the na so it would be with and i also think they have led ones at pep boys

 

These are good. I use them on my cars. They are available in the size you need.
http://www.amazon.com/Sylvania-3157A...885883&sr=8-19

 

not reallysure where ur from but thats deffinatly illegal as **** in michign to have red lights facing the front.