The release of the ID1600 is what prompted T1 to build these rails. There are more and more situations where the ID1000's aren't enough fuel, yet the ID2000's are tricky to get right with the stock ecu. The ID1600's really do run like stock injectors. Hard to believe, but it's 100% true, T1 has been running them in their GTR for over a month now with these rails.
Anyways, the ID1600's are too long to fit the GTR. The factory rail can be modified for height but then it hits the intake manifold. T1's rails are designed for the longer injector (12mm longer than stock). These rails are all 1 piece, no secondary mounting brackets or adaptors for the fuel damper and regulator. It made machining them a lot more work, but at the end of the day it's a better way to do it and it eliminates any possibility of mounting brackets coming loose or anything. The factory damper and regulator bolt on and in the same position as the stock rails, so these rails are 100% bolt on.
Fuel temperature is another issue that is often overlooked. The cylinder heads are hot and a lot of heat gets transferred from the heads, to the rails, to the fuel. They've incorporated 1/4" phenolic spacers between the heads and rails. Phenolic has excellent insulation properties, keeping as much heat out of the fuel rail as possible.
The kit also includes Goodridge fittings and line to connect the two rails behind the timing cover. Goodridge's top of the line components were used, the 'G Line XF' line is constructed of woven super light Aramid braid, with a PTFE inner bore - smooth inside for increased flow and convoluted outside for amazing flexibility. The hose is fully compatible with all fuels, including methanol. The lightweight crimp on hose ends ensure a leak free seal and light weight. The complete rail kit consists of both fuel rails, all Goodridge black anodized fittings and hose, SS mounting hardware, and phenolic spacers.