They structurally tie the tops of the strut towers together.Rufnek69 said:What the hell are strut bars for? I see there is front ones that go under your hood, and rear ones that go in the trunk,... these seem to be pretty inexpensive.. what the hell do they do??
The anti-sway bar is a different animal than a strut tower bar. The anti-sway acts like a torsion-spring; with each end tied to the lower control arms and connected to the chassis of the car through compliant bushings, it's intended purpose is to resist the control arms from moving in different directions, using the chassis as the "fulcrum". The control arms will move in different directions when, say, going around a corner: when the car leans, the inside control arm moves down, the outside one moves up. The anti-sway bar twists in this condition, resisting the motion, which is caused by body lean. Resisting it means less body motion.jiffy6969 said:This is a question I have asked also Rufneck. Speaking of the front strut bar.
My personal opinion--I have no facts to back it up, is that unless there is some sort of structural damage to the car, I don't see why it would make an even significant difference. You see, our cars, like most cars, come with an anti-sway bar anyway. It is bolted right to the A-frame, which to me is even more of an anti-sway than the top of each strut.
Well, there will always be a certain amount of movement in any mechanical assembly like this. Certainly, there's nothing particularly exotic or super-strong about stamped sheet metal bent into roughly the shape of a box (with no top or bottom) and spot-welded together. Cars like the PGT and the MX6 are admirably stiff (moreso than many other cars in their class & price range) but there's still movement there.If you think about it, the top of the struts should not be moving anyway.
There is a skinny anti-sway bar back there (on the V6 anyway). But it's serving a different purpose than a strut-tower reinforcement bar.I don't believe there is a anti-sway bar on the rear struts (someone correct me if I'm wrong), so it may benefit you to have a rear strut bar.
But for those that are into cornering (and, considering the FWD platform and the comparatively limited power output, that's really what the car's forte is), a strut bar can really help to tighten the car up, make it turn in slightly quicker, get rid of annoying rattles etc.But I'm not much into "twisting" my car anyway. Tight cornering just makes me lean left and right--that doesn't do any thing for me. I also think that that puts undue stress on the body, and suspension components. I'm into acceleration.