High Performance Hose, 2.75" 90 Deg. Molded Silicone Elbow; Red = $14.00

How about X-3095 for black?

High Performance Hose, 2.75" x 3.00" 45 Deg. Molded Silicone Step Elbow; Red $13.60

Or X-3013 for black?

10$ Shipping.
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ATP-STL-007
Price:$22.00

Shipping Weight: 3.00 pounds
10$ shipping?
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And I'll need 4 clamps. X-4004 or X-4005?

Clamp, .048 Clamp 2 9/16" x 3.50" Max
Clamp, .056 Clamp 3 1/16" x 4.00" Max

So add another 4$
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Total = 73.60$

Do I need any sort of glue or anything?

And last question is how does the 45 Deg attach to the MAF?