CUSTOM THROTTLE BODY KITS ( ITB's )….. LINKAGE, FUEL AND AIR PARTS, EMS KIT: > Adaptors & Flanges   Airbox/ Plenum Flanges ( 4 & 6 Cyl. ) 89MM~105MM Plenum Plates, used for Plenum or Airbox Construction. $ 169.00               More Information Base Plate - 40-45mm DCOE/IDF. Base Plate - 45mm DCOE/IDF. $ 44.50               More Information Base Plate - 40mm SU. Base Plate - 40mm SU. $ 24.00               More Information L6 - DATSUN Z / PLENUM FLANGE Plenum Plate for 6 Cylinder engines. $ 199.00               More Information      Quantity:     Weld Plate - 50mm DCOE/IDF. Weld Plate - 50mm ID DCOE & IDF. $ 38.00               More Information      Quantity: