I want this plenum... anyone know who made it?

[J. Fast]

FYI to those interested in this item. It looks like the runners are going to be shorter than stock, possibly 2 inches shorter? Also, the runner design is different for the TT runners versus the NA runners.

N/A intake runners are smooth interior tubes. Twin turbo runners have a V-groove in the ceiling.

The XM surge tank is twice the capacity of stock, and with the NA runners bolted on the runner length will be 2 inches shorter. The shortened runner length should improve the horsepower area of the curve, and take away from the torque. Likely a good thing if you want to rev and shift higher than 5000 rpms. I'm hoping this is a huge benefit with the design of the stock cams and boost taper on the top end.

We'll see.





If anybody has an N/A plenum and TT plenum if you would like to post pictures of the runner roof design differences for the sake of comparison and future discussion that would be great!

I'll get to it if no one else does.