I personally, this is if your doing swap yourself as I plan to do, would rather buy the whole front clip... now I didn't look at all those links so I can't know but does anyone have good sites were they sell the front clips? more in particular a 180sx front clip would be best but a S13 coupe clip wouldn't be that bad either. Also what are the differences between the red top and black top. I already know the years and models they came with, blacks will usually have less miles etc... But are there any other real differences? I heard something about the intake setup on the engine being a bit different and its better on the red top if your going to make serious HP. Are the Pistons and compression ratios all the same?