I need the part number for the one way check valve going to the map sensor. These things cost too much, so I want to make sure to get the correct part.

 

That's not a check valve, that's a filter. I'm not sure of the part number, but you should be able to find it in the parts diagrams:

http://www.mazdaformance.com/rx7.htm

 

I have a parts diagram. I need to make sure I'm going to order the right part. My old filter I have, has an arrow on it, which I'm assuming one direction flow. The diagram I have shows the part number to be S5A1-18-744. Is this correct?

 

Order from Ray:

Malloy Mazda
1-888-533-3400
Talk to Ray Crowe

He'll make sure you have the right parts.

 

One more question, does the arrow mean air should only flow in one direction?

 

Nope, it's not a check valve. It's the direction for filteration.

 

Oh, then the one I have might not be bad... thanks.