Whats the differance between STI Injectors and Sard Injectors. I am looking at ones to fit a 2004 WRX, top feed I believe

Ones OEM and the other aftermarket.
You can get 550cc with STis
and with Sard different cc

you may need the correct collars with the sard to suit (to allow direct fit)

If you have the top feed injectors, i heard that you can get them highflowed up to 800cc or de-capped or something like that...

Its a much cheaper alternative to brand new injectors, and might be worth trying before you fork out for the new injectors

the ones I have for sale are direct Bolt in, no mods needed. And they are brand new

pm me if u want

With injectors, you need to know the dwell time (dead time) for each firing at different voltages. VERY IMPORTANT for consistant flow!

Make sure you know the latency or you'll encounter problems in tuning them.

A side question - I'm told the MY06 WRX injectors are 550cc. Can anyone confirm this?