I have a Bug STI and am purchasing a TD05/06 20g off a fellow SNetter

Currently i will be retaining the following

FMIC
HKS Fcon ECU
HKS EVC 5 boost control
HKS Iridium plugs
Walbro fuel pump
Induction Kit
Decat 3" exhaust

I'm guessing headers are recommended and if so what ones should i be thinking about?
Also should injectors be upped to 640's?

Any other supporting mods i should be considering? i'm hoping to be around ~400bhp mark if possible
Cheers in advance

 

i think if will feel very laggy with the 20g... but not sure....

 

I spoke to a few people with them on a new age and they say it's all scare mongering , 20g all the way

 

btt

 

550 injectors will suffice, GT spec or Gruppe-S headers are good quality at good price. they will require wrapping for full effect.

I would fit a catch can, and do some reliabilty mods along the way. manifold spacers etc.

I would get shot of the plugs and put some NGK's in myself, and would consider a parralel fuel rail mod.

Obviously you realise you are at or near the limit - you should do all the little things to aid reliability and keep charge temps down.

 

As a user of a 20g with mods I totally agree with your current and P1mark's suggestions, but remember to add a GOOD mapper, Optimax with NF too.

The 20g's delivery is rather special, lagg? maybe if you drive it like a deisel, but keep it above 3500 and it will be a delight.

Graham