Just fitted bc coilovers to my version 5 wrx. But suspension i took off is a genuine subaru item, its stamped subaru. But its gas filled KYB struts in red. I think this is sti suspension. Does anyone know if any WRX`s came with red KYB struts?

 

Not sure if this helps, found from a quick google search.

These are the same struts the Subaru ReBrands as SPT. Save $$$ over the dealerships overpriced option.
1- Allow drivers to adjust damping to match specific driving conditions
2- Manually adjustable multistage damping.
3- Adjusts from street to strip to track in seconds.
4- No need to lift vehicle or use special tools.
5-Competition grade engineering and construction.

http://www.iwsti.com/forums/brakes-s...ag2-299-a.html

 

The ones i have arn`t ajustable. But all the red suspension ones iv seen for sell have been advertised as sti. Car was imported to order brand new in 1999 im second owner. Car has been serviced at the dealer that imported it all its life. So may give my dealer a ring and ask if the first owner either had them fitted as an option when the car was new or replaced them later. It may be standard but as i said in first post only ever seen red units be marketed as sti.