I'm buying front swar bar bushings for my 89 IROC 305 TPI Automatic. The catalog lists 3 different sway bar sizes and I have no idea which one is on my car, 30, 32 or 34 MM? Can anyone help? Thanks in advance.

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89 IROC original owner, 3 amplifier 8 speaker Kenwood/Infinity sound system, 300,000 miles on original 305 TPI. Change your oil!!!
http://members.bellatlantic.net/~viking88/iroc.html

 

I like the sig- change the oil!

Take a large open-ended adjustable wrench, tighten it down on the sway bar, and measure the gap with a ruler. That'll tell ya. Measure the sway bar in a few places to make sure of your measurement. You might have a 36mm front bar if you have the WS6 option code on your glovebox sticker (aka "Performance Suspension" badge on dashboard).


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards

 

If it turns out your car has 36 mm front sway bar the 34 mm bushings work fine, no modifications req'd. Also I recommend getting ones with grease fitings. Or you can take the route I did and modify the stock bushing retainers and bushings to make them greasable.

 

The stock swaybar on my 84 Z28 is 32mm or 1.260"!

-Auggie-