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Image Credits: Injector Online (www.injectorsonline.com) - go buy shit from them, good prices and fast delivery! So yeah - I'm actually stuck and need everyone's thoughts and opinions! Long story short, I know RB25DET NEO plenums like to take 3/4 height top feed injectors, which are approximately 52~55cm o-ring to o-ring in distance. Most will just get a set of 1000cc Bosch injectors OR modified Bosch 1250cc injectors that are of that length. I wanted more fuel supply, so opted for the non-modified Bosch 1550cc (1650cc often advertised) injectors. These injectors are 1/2 height, and are approximately 40mm o-ring to o-ring in distance, with the correct extension you can make these the same height as your typical 3/4 height Bosch 1000cc or XSpurt 1000cc injector. Below is the same injector now with the extension, giving you that 3/4 height. Theoretically they now should just bolt up and off you go right? Many sites from various countries tend to advertise 1/2 height injectors with extensions (making them 3/4 height injectors) as direct fit - however here's the fun part, you actually can't even get the injector to go all the way into the injector seat on the RB25DET NEO intake manifold. They simply just don't work! Problem is, as they are so short before the hard plastic that keeps the o-ring captive doesn't even touch the injector seating area of the intake manifold because the injector plug ends up touching the intake manifold. Being the person that at times thinks outside the box, I went on and installed a bunch of 14mmx5.5mm injector buffers from a GT-R thinking that would solve the problem. Well - it kind of did, now there's a bit of space and the injectors are somewhat sealing well... but yes, now the connectors won't even go on! because there's simply not enough room. So I am really intrigued how these different suppliers are all listing these injectors as direct fit - when clearly they won't? (noting all the injectors are 1/2 height with either full height or 3/4 height extensions) https://www.injectorsonline.com/au/1500cc-xspurt-injectors-x-6-neo.html https://www.golebysparts.com.au/parts/view/2053/58/nissan-rb20-25-26/fuel-rails-and-fuel-rail-injector-kits/rb25-r34-neo-plazmaman-fuel-rail-kit-2000cc-injectors https://www.ebay.com.au/itm/Nissan-1300cc-Fuel-injectors-RB25DET-NEO-R34-Skyline-Stagea-C34-Plug-Play/182639648111?epid=6004139375&hash=item2a862bdd6f:g:S~QAAOSw4DJYlreh https://www.ebay.com.au/itm/Bosch-2200cc-Flow-Matched-Injector-Set-For-Nissan-Skyline-R33-I6-RB25-Neo/222702641007?hash=item33da1c9f6f:g:u9wAAOSw0exZ-oq3 So the question, how did you guys with 2000/2200cc Bosch CNG or ID1050/1300/1700 injectors get them on? considering they are all 1/2 height and all require to be extended? I would assume all the plugs would hit the same region and would disrupt how the injector would be seated. And FWIW, I'm using a Plazmaman rail (still, doesn't affect how the connects sit and/or hit the intake). (yes I even changed extenders so they're identical to the Xspurt kit, I sourced my injectors elsewhere though) Also you can't really rotate the plugs upwards because the injectors no longer will seal properly. My ultimate last option is to go install a R33 intake manifold on my R34 NEO motor (which I don't want to do). Thanks all!