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I have a 2004 sedan that came stock with 15.9/12mm sway bars combo. I bought front and rear sway bar from a 2002 RSX-S (23mm/19mm).

I recently installed the rear one and the car is far better than stock and I like it (15.9/19). But, since the car is only use on street/highway and will be use in snow, and that I am only looking for high speed stability in straight line/curve what should I do?

Keep it like this and sell the front RSX bar? (15.9/19: seem to be good for Solo2!)
install the 23mm front bar? (23/19: good? bad?)
Find and install a OEM 25.4 front bar? (25.4/19: like a lot of people!)

I know that it will be better for me to simply test the different combo myself and keep what better suit me, but maybe some of you already played with that...

 
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the front RSX bar may or may not fit without modification, so if you don't want to modify your exhaust, then there is your answer. If you are looking for autox, I have the 25.4 and the 19mm. If i had the choice, I would go larger on the rear bar and be 25.4 front and 22-25mm rear, but it depends on the rest of your suspension set up too.

 
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Thx!

Sorry, I forgot to specified that my car is a SE (Canadian version of the VP), so I won't have an exhaust fitment problem.

The rest of the suspension is stock (for now at least!), with original 14" tire . I only have a Neuspeed front strut bar and a Megan rear lower tie-bar, but it mostly affect the chassis.

 
Rep Power: 380

If the cars going to be used in the snow, you are probably better off adding a 25.4mm front bar (Or better still, the 22mm front bar off of the 02 Sedans..) Reasoning behind this is that tail happy cars, while great for autocross and open track, tend to be a bit unstable in Low grip situations such as Rain and Snow.

Other wise, if you're tuning for maximum performance... you should be looking at getting a good set of adjustible dampers (Cough.. Koni... Cough..) rather then messing with the anti-roll bars. Especially if you plan on keeping the stock springs.

 
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im happy with my set-up...

25.4mm front (stock)
19mm rear (RSX-S)
Tokico shocks/struts
Neuspeed sport springs

 
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So my front RSX bar (23mm) can be a good (and safe) alternative. I will however check If I can find a 25.4mm bar locally, since the 25.4/19mm combo gave good result.

 
Rep Power: 285

what year car did the 25.4mm come off of?

 
Rep Power: 380

The 01 and 02 Coupes..

 
Rep Power: 285

ah.. thank you for the quick response

 
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I think for me that the best combo (EX 02 sedan) is to go front 25.4mm front from a coupe 01-02 and rear 19mm from a RSX-S