I have recently installed an sti 8 intercooler on a my99 classic, and am now looking at ways to get as much air threw it as possible!
I have taken off the original underscoop, as was no where near big enough, also looked into fittimg an sti8 undertray however i have realised this isn't a very good fit. So i'm now thinking about making my own one, however im new to diy projects and need as much help as possible, if anybody could give some tips on how to go about doing this, or even materials used and dimensions it would be a great help......

many thanks

 

I recently noticed the same prob on my bug WRX i have installed the same ic as you, and have noticed only about 75% of it is getting air from the scoop

 

Use an STi 7 or 8 undertray, remove the two side panels and centre support holding the main duct guide.
Substitite with 1mm aluminium sheet to create a duct that fits under your chosen scoop.
I stuck the sheeting in place with Araldite and smoothed off with ali flashing.
This one fits under an 03 WRX scoop.



Nick

 

were do u get the undrer tray from a STi, looked for oen for abt 2 months

 

I modified the original undertray to suit. Have a look at the pics via the link below.

Index of /Scooby Pics/SplitterSTI8IC

 

Useful pics.
The under tray is very important to the performance of the TMIC.
You could make your own undertray with a sheet of carbon fibre.

 

Does anybody know where I can get an after market replica scoop, something like STi8/9 to go on an STi3?
How much?

 

Harvey try

ETSRacing.com Subaru Styling Products GRP Manufacuturers, www.etsracing.com

Stuart

 

Cheers mate.

 

have one for sale if interested

 

anymore examples of DIY undertrays please