These are the basic parts needed for your 13B-REW engine rebuild.
 
Through years of experience, we have come down to these:
 
Goopy Apex seals x6
Mazda OEM Apex seal springs  x6 short (N32611C04A)
Mazda OEM Apex seal springs  x6 long (N32611C06C)
Mazda OEM Side seals x12 (N3Y111C11)
Mazda OEM Side seal springs INCONEL x12 (NF0111C17)
Mazda OEM Corner seals x12 (N32611C20A)
Mazda OEM Corner seal springs INCONEL x12 (NF0111C24)
Viton Oil control O-Rings for 2 rotors
Mazda OEM front main seal 
Mazda OEM rear main seal
Aftermarket gasket set
Rear stationary O-Ring
Oil pickup tube gasket
Grey silicone
 
Don't forget to buy new front cover gasket and/or stationary/rotor bearings.