High underhood temperatures from your turbocharged Subaru will wreak havoc on the plastic parts over time. You really don't want the hassle of a leaking plastic coolant expansion tank. Besides, the original tank probably doesn't look all that good after all these years. Here is a direct replacement that is an upgrade from the original plastic tank, but also looks "racy"!

• Direct bolt-in replacement to stock tanks, such as Subaru Part No. 21132AA131
• Has 50% more capacity than Subaru Part No. 21132AA131
• Fabricated aluminum for strength, factory tanks fail after repeated high-heat situations
• This aluminum tank can be polished, chromed, painted, powder coated or left as-is for a race look
• Includes billet aluminum filler neck,Moroso Racing Radiator Cap in the stock pressure range and integral billet aluminum hose fittings that are better looking and more trouble free than screw in fittings
• By having this style of radiator neck, the user can change the operating pressure by purchasing Moroso’s No. 63328 Racing Radiator Cap in the 27-29 lbs. range

Fits Subaru WRX 2006 and 2007, as well as the 2004 2005 2006 2007 STi.