Aeroflow Fuel Rail Fits Holden 304-355 V8 Fuel Rails Suit 14mm 8ORB Ports -Black Sleeving but they are a direct

but they are a direct plug and play to the Aeroflow Performance Smart Coils (AF4020-8289)

Valve Cover Breather Cap Push In 1"(25mm) Neck Chrome Top Black Element + Grommet 60mm Tall 70mm Wide

For Holden Commodore V8 VR-VS Fuel Inj (Square Plug)

and they're also clearly marked for proper flow direction

and some 700R4

Aeroflow Fuel Rail Fits Holden 304-355 V8 Fuel Rails Suit 14mm 8ORB Ports -Black Sleeving but they are a directPart Number : AF64 2008BLK Holden 304 355 V8 Billet EFI Fuel Rails Black Suit 14mm Full Length Fuel Injectors, 8ORB Ports Aeroflow's Billet EFI Fuel rails feature precision machining with heavy duty mounts for high pressure applications. Aeroflow fuel rails are threaded with a 8AN ORB port and have a 16. 1mm 41 64" size bore. Aeroflow fuel rails are double anodised.