All the technical specifications for the FE3 - Taken from the OEM technical data for the mazda 626's FE-DOHC

• Intake 45 Degrees
• Exhaust 45 Degrees

• Intake 1.2 - 1.6 mm
• Exhaust 1.2 - 1.6 mm

• Intake Standard 36.8 mm
  • Maximum 37.8 mm
• Exhaust Standard 36.8mm
  • Maximum 37.8 mm

• Outer Standard 39.1 mm
  • Minimum 38.7 mm
• Inner Standard 38.0 mm
  • Minimum 37.7mm

• Outer 1.4mm
• Inner 1.3mm

• Outer Load 8 kg
• Outer Height 31.5 mm
• Inner Load 12.5 kg
• Inner Height 33 mm

• Intake Standard 45.005 - 45.105 mm
  • Minimum 44.855 mm
• Exhaust Standard 45.005 - 45.105 mm
  • Minimum 44.855 mm

• Standard 29.94 - 29.965 mm
  • Out Of Round 0.05 mm

• Standard 0.035 - 0.085 mm
  • Maximum 0.15 mm

• Maximum 0.03 mm

• Standard 0.08 - 0.1 mm
  • Maximum 0.2 mm

• Height 289.0 mm

• Maximum 0.15 mm

• Maximum 0.2 mm

• Standard 86 - 86.019mm
• 0.25 mm Oversize 86.25 - 86.269 mm
• 0.5 mm Oversize 86.5 - 86.519 mm

• Maximum 0.019mm

Measured 90 degrees from pin bore axis and 18 mm below oil ring groove

• Standard 85.944 - 85.964 mm
• 0.25 mm Oversize 86.194 - 86.214 mm
• 0.5 mm Oversize 86.444 - 86.464 mm

• Standard 0.036 - 0.075 mm
  • Maximum 0.15 mm

https://www.mazdabg.com/ftp-uploads/626/GD%20workshop%20manual/FE-DOCH/Technical_Data.pdf