im looking into getting a new rear sway bar for my 180ttq. should i go with the euro oem 19mm or the h&r 21mm. this would be my only suspension upgrade so far. is it worth doing, will i notice a significant difference vs. stock? thanks.

 

Either one would be fine. The H&R 21mm is pretty much the equivalent of a 19mm non-adjustable bar. It will make the car close to neutral in corners. After install, equalize tire pressures front and rear, the differential in the manual is to address the understeer in the stock suspension.

 

See one of my recent posts for a ride report. I installed the Neuspeed 19mm last week and tracked the car last Friday. This has been one of my better mods. The car handled very neutral and the difference over stock was surprisingly noticeable.