i used a Griffin racing aluminum radiator. they are a well know brand. you can get universal ones in various sizes at
www.summitracing.com for about 180-190 usd, which is a very good price.
here is a pic of the one i got. 27.5in x 15.5in. and about 3 inches wide.
Here is info on wrx stock and aftermarket radiators to use as a base.
stock, dry wt 7.6lbs
22 mm thick, plastic end tank galore, OEM replacement costs $253
Total coolant system is approx 2 gallons
*stock fans mount with non-machined screws. Most aftermarket units will need new bolts to remount the fans.
C&R - custom replacement, US made
50.8 mm thick, 1-row design, comes with new SPAL fans (11" drivers side, 14" passenger's side) and reservoir tank. Dimensions are 27"x14"x2" (50.8mm thick), however Egan stated that the end tanks are 2" but the core is thinner
Fluidyne - Direct replacement, US made
38 mm thick, 1-row design, reuse stock fans
coolant capacity is approx 0.5 gallons more than stock
*required parts, five m6 x 1.0 screws to remount the stock fans. Length anywhere from 12mm to 16mm
MRT - Direct replacement, Aussie made
32 mm thick, unknown # rows, reuse stock fans, strikingly similar to the PWR
PWR - Direct replacement, Aussie made, dry wt 11.4 lbs
37 mm thick, 1-row design, reuse stock fans
coolant capacity is approx 0.5 gallons more than stock
precaution for PWR install regarding mounting bracket rubbing
Speedmonkee - Direct replacement, US made, dry wt 8.9 lbs
38.1 mm thick, 1-row design, reuse stock fans
http://forums.nasioc.com/forums/sho...hlight=radiator
coolant capacity is approx 0.5 gallons more than stock
-Ryan