PORTS AND FITTINGS
The fuel rail ports are tapped for 8AN ORB.
Appropriate fittings must be selected based on the specific application. Ample space around the fuel rail port(s) is necessary for larger accessories such as fuel pressure regulators, fuel pressure gauges, and fuel pulse dampers. To verify clearance, the dimensional drawings on the product pages can be used as a reference guide.
These fuel rails are compatible with the following vehicles that use the General Motors LS9/LSA V8 engines:
2009-2013 Chevrolet Corvette ZR1
2012-2015 Chevrolet Camaro ZL1
2009-2015 Cadillac CTS-V
2015-2017 HSV Senature Signature
2015-2017 HSV Clubsport R8
2015-2017 HSV Maloo R8
2013-2017 HSV GTS
2014+ Equus Bass 770
2017 HSV GTSR and GTSR Maloo
2014 HSV GTS Maloo
2017 HSV GTSR W1
The fuel rails are CNC machined from 6061 aluminum, black anodized, and laser etched for a high quality surface finish. Each fuel rail has six 8AN ORB ports, twelve ports in all. 
The fuel rails feature polished stainless steel brackets that attach to factory fuel rail mounting points. No vehicle modifications are required. Like the OEM fuel rails, the injector bores are 14mm ID and are compatible with factory fuel injectors. Additionally, these rails have provisions for the factory injector clips, as shown below. 
Everything is compatible with all fuel types including popular alcohol mixtures such as E85.
20-0362 Fuel Rails, GM LS9/LSA
This includes 2 black anodized fuel rails, stainless steel mounts, and stainless steel hardware. Adapter fittings are NOT included.