KYB is one of Japan's premier shock builders. Their AGX product provides adjustable dampening without having to move to a coil-over suspension. The AGX struts are generally a little more firmly-damped than stock struts, so they work great with moderate lowering springs.

Adjustment is with a knob on the top of the shock, both front and rear. Adjusting the rears will require removing the rear seats to access the adjustment knob.

Adjustment is four-way front and rear, and adjusts both rebound and compression simultaneously. Softest setting is slightly firmer than stock; hardest is very stiff.

Fits all 2002-2007 WRX (not STI). (You'll want to use on 2004-07 cars.) Available as a complete set of four, or individually. Note: Older AGX rear shocks had an adjuster knob on the lower side. Newer ones have a top adjustment, like the front. It's still the same internals.