ouch greenline.jp 5544 Yen each collar? that 50 AUD each plus what ever they charge in post. perfect run 5100 Yen each so not much better. 300 bucks on top of the injectors, not to mention the potential leaks these can cause (search for more info) also is your ecu socketed to allow for a modified chip to handle larger injectors? nistune?
Thats why I made the ones in the old GB. I'd surprised if all of them got used by people who bought them. Search for the old GB and PM people who bought them. Bound to find a few sets in drawers unused.