The m4 has a blueish tint to it in the park lights I seen the m6 alot brighter I have the m4 in mine now because I don't want to melt my housing or break the bulb in the light housing but the m4 look real good for the clear obx sidemarkers.

 

if you really want to use the M6 without harming your stock harness, make your own harness with a relay so that the bulbs take power straight from the battery

 

M6's look better but typically don't last as long. I had M6's but when one blew I put M4's in a couple of years ago - not as bright but still much better than stock.

Oh and M6's are a LOT bigger bulb and a bit of a biyatch to get through the light housing.

 

Wow. Thanks to all you guys! I think I'm going to start off w/ the M6's and see how that goes...I hope it doesn't melt anything! Oh, and I just started modding too...got my first mod in yesterday!...wooohoooo!!!...'01-'05 tail lights...I think I've been bitten by the modding bug....and I like it!!!

 

Where can I get these Polarg bulbs to buy?