Confirm these line sizes for me. S4NA
 

Underhood fuel hard lines straight to fuel rail without using the pipes attached to the vacuum crap.

8mm


Coolant lines from engine to bac and back


10mm


Misc vac lines

4mm

My return came in and i started ordering stuff!!!!!! w00t.

Off the top of my head, fuel lines are 5/16", heater lines are 5/8?", smaller ones are 3/8", and vacuum lines should be about 3/16".

Thanks!

Lucky me my vac lines are in good shape. Everything else looks crap. :(

Most of the vac lines are actually 3.5mm or 5/32". 4mm (about 3/16") will work, but it will leak under higher boost levels if you are turbo (which you are not).

For the fuel lines, use 5/16" fuel hose from an auto parts store, or convert to AN lines. DO NOT put fuel in silicone hose.

For the small water lines, most of them you should order from the dealer/mazdatrix/whatever. They are molded hoses with crazy angles and they need to be OEM.

see http://www.mazdatrix.com/C-SILHOS.HTM and http://www.mazdatrix.com/bhose2.htm