They are both lip kits hence the similar looking appearance. The actual height of the xenon kit is larger than the highsport, aswell as small details that make it look like a custom kit rather than just plain and flat all the way around. I'll take more photos of mine to show you the difference.

 

So here are some photos of me with MeanShawMonte, and as you can see he has the highsport lip. Hope this helps clarify the differences.

 

Ok I see some differences now. Is the rear spoiler slightly different too? With the gap on the front bottom of the front vallance do you think a front splitter would look ok? and nice wheels are those chrome casinos?

 

Yes the xenon rear valence is different from the highsport (its a little bigger and doesn't really sit on the edge of the trunk lid, I posted some pics if you go back one page lol). Also there isn't really a gap on the front end but adding a splitter may look a little better on the HS, I would need to see what you have in mind. And yes I'm sittin on casino's

 

Is it possible to purchase the high sport package itself? I really would like to add the rear bumper piece.

 

Its basicaly a flat one piece or two piece fiberglass or carbon fiber board that bolts under the kit and is used for extra downforce. Boss mustangs with the leguna seca package come stock with it. I think it may look more at home on a combat body kit but might work with a smaller 2 piece on the xenon.

 

Yes it is possible, but going that route would put a larger hole in your wallet if you decide to buy from gm. I personally looked everywhere online with no luck. Maybe a junkyard may have it.

I'm thinking lol, The front of the stang's bumper is flat all the way around as appose to the xenon kit slightly pointing down at a 35 degree angle. It would forsure look wicked on the combat kit but imo it would be overkill on the xenon, even with a smaller 2 piece set up.

 

yea leguna seca stang is a one piece the two piece would only be on left and right side nothing in the middle. With the angle I dont think it will work tho.