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Is anyone running a WRX rear sway bar on the stock rear suspension (trailing arm, lateral links). My understanding is that you need to notch the spare tire "bump". I am just looking for conformation before I order a whiteline rear sway.

Yes, that is my understanding as well. The Impreza bar has clearance issues on the spare tire bump.

Anyone else....? I probably will end up trying it and posting it so that way when someone searches google they get an answer.

I have an OEM STI sway bar on my car, and yes you need to get rid of the bump. I used an angle grinder...and while its not pretty it works. Also, when you cut into the bump you won't be cutting a hole into your trunk, its a hollow space.

Does anyone know what that damned bump is for anyway?

Its so you can attach a little trailer hitch to your car

Ordered a 24mm whiteline sway bar for the 03-04 WRX. I will have it thursday. Will take pics and let you guys know what happens.

I didn't get pictures. It does work. However it's a serious PITA in my opinion. The bushings that come with the bar have to have the lip trimmed off of them to fit the older sway bar bracket mounts.

If I ever had to do this again I would just buy a bar made for the Legacy. Even though Whiteline only makes a 22mm.

I not only had to cut the "bump" out of the spare tire well I had to hammer some of it in.

Well that's good feedback for others.

Thanks for sharing.

The bar for the 02-03 (BSR33) comes with the right bushings. 04-07 (BSR36) is a different design. I find the 22mm adjustable rear is plenty of bar for street/fun driving on decent tires. If I was doing track days or a lot of auto-x I might think about cutting things up to make a 24mm bar fit.

Baddog wrote:I didn't get pictures. It does work. However it's a serious PITA in my opinion. The bushings that come with the bar have to have the lip trimmed off of them to fit the older sway bar bracket mounts.

If I ever had to do this again I would just buy a bar made for the Legacy. Even though Whiteline only makes a 22mm.

I not only had to cut the "bump" out of the spare tire well I had to hammer some of it in.

But just think of the feeling you get afterwards knowing you've made something work that was never supposed to work in the first place.