Don't count out the twinscroll legacies! My legacy estate has far more room than the forester had as the chassis is longer where as the foresters are based on the impreza floor pan. Yes the foresters have a higher roof bit in terms of usable volume the Legacy beats it hands down. Also the build of the legacies is better with more refined materials and greater sound deadening. The 5 speed auto will take up to 400bhp if the valve is upgraded and the manuals are 6 speed from the 2006 facelift onwards.
If I had the money I'd be swapping to this.....
https://m.ebay.co.uk/itm/2006-JDM-SU...UAAOSwAHBaO7WT
Or
https://m.ebay.co.uk/itm/MANUAL-Suba...gAAOSwY~VZdKdY
Or
https://m.ebay.co.uk/itm/2005-JDM-SU...IAAOSwR2RaRnhP
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2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter