KCS

iTrader: (20)

First off, I've already contacted FAST with this question a few days ago and haven't gotten a response yet. I Google searched as well and still found nothing, so I'm hoping someone on here might know.

My question is whether or not the top shells are interchangeable between the shorter LSXR car intake and the tall *** LSXRT truck intake. I originally intended to use it in my Mustang where hood clearance wasn't a concern, but I'm switching gears and wanting to use it in one of my Fbodies.

Patron

KCS here's a Idea purchase the one you want if it doesn't fit send it back.... I've done it a few times. You'll lose a little change on the restocking fee.

jebcamaro

iTrader: (28)

They are two different intakes. They will not interchange.

KCS

iTrader: (20)

Well that sucks. I was hoping the bottom shells were the same.

Jimbo1367

And the runners....?

slogo

I have a fast cathedral lsxrt and fast ls7 intake, and the tops will swap out.

KCS

iTrader: (20)

That's interesting! Thanks

slogo

You can see the bolt pattern is identical, it fits and bolts down perfect, I would think all the newer intakes are the same.

KCS

iTrader: (20)

It seems as though you were wrong. The top shells were swapped out in a recent dyno test.

"For this test, we replaced the standard LSXR upper intake section with the larger LSXRT intake. Often referred to as the truck intake, the LSXRT top simply offers increased plenum volume on this adjustable intake application. This combination was still equipped with the short runners used in the previous test. "

http://www.hotrod.com/articles/giant...dyno-shootout/

jebcamaro

iTrader: (28)

I have the LSXRT and was told once upon a time they were not swappable. However, I've never compared the two side by side, but it appears they are. Sorry

G Atsma

The bolt pattern might be identical, but the gasket surface is NOT. Check the area to the right of the TB mounting pad. The curves of the gasket channels ARE different.

KCS

iTrader: (20)

Is this based on personal experience or are you going off the picture? Considering the difference in height of the two shells, the distance and angle from the lens will be different and skew the shape a little bit. I don't think they're that different that they wont interchange.

G Atsma

Look at the curvature of the gasket surface on the lower right corner of each piece as it us in the pic. The curves are different. One has a fairly sharp corner, and the other has that corner "smoothed out" quite a bit. If that is due to the photo angle then I stand corrected. I was only going off the pic.

slogo

It is exactly what KCS said, difference of height of the 2 shells makes it look different
in the picture, they are EXACTLY the same, I personally bolted both of them on the
2 different bases, and one is a LS7 base and the other is a Cathedral base.
Camara angle as well.

01CamaroSSTx

iTrader: (3)

From the pictures one seems longer than the other.

01CamaroSSTx

iTrader: (3)

Pretty sure FAST designed them not to be interchangeable for $$ sake but if anyone would know it would be them.