What exactly does the 337 package consist of... Ive seen seats, rims, and a little interior stuff, and as far as i knew, an extra gear..... but, what else, if anything is there? Did they come in any color but silver?

 

no just silver with a "body kit" and nice wheels

 

Here is basically what it came with:

Recaro front seats
Red/black fabric and brushed aluminum interior trim
18"x7.5" BBS RC rims (custom size for VW)
6 spd tranny
180hp 1.8T
Votex body kit
single tip exhaust
Solid rubber trailing arm bushing in the rear (as opposed to the stock gel-filled kind)
1" lower sport suspension
12.1" front rotors and 10" rear vented rotors (from a TT)
Silver is the only color

And there are only 1500 in the US.

That's pretty much the main points of the car.