Hi i'm new to the site, i've just bought my first Impreza a 2005 WRX and want to increase performance to around 300bhp. i've looked on the Andy Forrest site where it says this will be achievable with the following upgrades:

Full Decat or Sportscat exhaust from turbo back 2.5 or 3” bore.
Decat uppipe Pre turbo
Walbro 255 l/hr uprated fuel pump
K+N panel filter
Twin boost set up for high/low power switchable in-car
AFP 04-H custom ported hybrid turbo
High Flow multi spray fuel injectors 550cc (380cc as std)
Uprated turbo to intercooler 'Y' pipe
NGK PFR 7B uprated spark plugs

Just wonderd if anyone could tell me where i can buy these parts online? and what to buy first. Cheers

 

Have a look in the Vendors section on here would be a good start imo.

 

Larkspeed - Exhaust Scoobyparts - Walbro Japspeed - Y Pipe, Jp4mance - Plugs. Thats where I went for mine.

 

If I was you I'd upgrade the brakes first bud. Been in your position when I first had mine and quickly realised how poor the stoppers were even before up'ing the power. After that I'd put the parts on that don't require a remap first if you want to spread the cost so, plugs, air filter, intercooler, fuel pump and exhaust apart from the downpipe. Then when your ready for a map get the turbo and injectors fitted and then mapped afterwards.

 

Look at a vf35 instead of a tdo4h. It will c 340 but your gear box will not but with the vf u will be running safe and they are normaly £300-350, exhaust if yours was a prodrive it's cool for 320hp so no need to change Plus u will not have to worry about the mot fail due to high co2s. Pfr7bs £40-50 yes and I would say k&n or cosworth panel filter £30-40 max and Sti top mount should come with y pipe £150 max and a good mapper £300 open source or -500-600 Ecu Tek. Mapper is a big thing. Good luck and as the post above said Breaks and pads. I think just pads

 

As post 2 says vendor then wanted or Scooby breakers

 

I've been running 346 bhp on my oem box for a while now with no issues All about how you treat it IMO.

Good luck with it though, post up some figures when it's done

 

What clutch you using mate?

 

Believe it or not the factory one, on 80k miles now and still going strong.

Never drop the clutch and rarely do launches, if I do I get it rollinging slightly first before feeding in the power. I'll probably put a exceedy fast road one on when the time comes.

 

Cheers guys vey helpfull