What the hell is this intake setup?
 

Never heard or seen this before.

http://static.summitracing.com/globa...518u0002_w.jpg

http://store.summitracing.com/partde...5&autoview=sku

Thats for the TF 4.6 intake, the upper intake or plenum. No idea why they would sell it seperate.

Probably so that it let's you decide whether you want a single or twin blade TB.

Ah now I see what you are talking about. I cam across that and I was like WTF is that for.