[XRstyle]

this might be a silly question but whats the difference between emissions and non emissions heads? i'm trying to work out what i can get away with over here in the UK :winks

 

[MustangMan5Oh]

I think the main difference (but im not completely positive) is that the stock heads have an air tube mounted in the back of them that pumps air for emissions. I put my Edelbrock Victor Jr.s on and they didnt have the hole for this tube, so im thinking they are Non-Emissions legal. Most heads will tell you if they are or arent, i know AFR's come in both designs, just get the emissions legal, it cant be real different.