Best place to buy 550cc injectors for my 05wrx? Mapped by Bob rawle (301bhp) I would like to take it to about 330/340bhp, so I will need a larger turbo also. I was thinking of Andy Forrest's td04 hybrid ( his injectors are £370 plus vat)

 

Why don't you just get your 440's modified for around £150 which includes a good clean, flow testing and matching. That should take them up to around 700cc and more than enough for what you want. Add to that a TD05 16G to easily see 340-350bhp no probs. Just make sure you have all the other supporting mods like exhaust and high flow air filter and don't take it any further than that to keep the engine and gearbox reliable and in one piece. Add to that another remap and you'll have a very quick WRX.

 

Sorry if this goes off topic, but are modified injectors worth doing? as in are they reliable, do they flow as well etc

 

The injectors are 420cc in that car.

They flow well when modified/flow tested/matched. Std STi Pink 550's would be easier though as they are a known quantity for the set up of the fueling in the map. Latencies can alter a bit when mapping around modded injectors and can make the idle a little lumpier.

A TD05 16G is very unlikely to get those figures but it depends on how power is being measured. Mind you TD04 is a tad optimistic at 301bhp IMO.

 

Bob rawle did say at the time it was exceptional for a wrx. I've contacted API and they have the 550 injectors I need so now to find the turbo, vf34/5 or a hybrid off Andy Forrest.