Joe,So, yes it helped you. That's what its supposed to do.
To answer the OP question, it depends. If your car has factory type wheels and tires, then i would say no, don't bother. It will make the car twichy on turn in. If you have upgraded tire size to 17" or larger, then i would say go for it. You will enjoy the difference on turn in.
You need to look at the suspension as a whole unit. Larger sway bars also need lower profile tires, and better shocks.
I have 17x8 wheels with 1 inch BMR lowering springs. F41 on an 87 SS and feel I need nothing else sway bar wise. Plus 4mm might interfere with the 255 40 17’s up front steering wise. I have the Year One replica stock wheels for 87.Joe,
What I'm saying is that the difference between bars may be negligible. I'm also using KYB Gas-adjust shocks, rear swaybar, body braces, Energy Suspension body mounts, 15 x 7 steelies with 235/60 x 15 Cooper Cobra tires, boxed rear control arms. All in all, I think the car handles pretty well for what it is.
I'm sure if I switched out to lower profile 17" wheels and tires, it would be a noticeable difference I'm sure. I'm sure the ride would be a bit harsher as well.
You are absolutely right. I also use that gear box. Like I said, after I did just a few thing I was impressed with how it handlesI think my point is, that you can get your car to handle pretty well without breaking the bank and using factory enhancements. The 60 series tires provides decent handling and ride comfort without being too harsh on the street. Over the years I gleaned many tricks on the Monte SS forum. I'm also using the Monte SS quick ratio steering box.
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