Rotors are the same, calipers differ but still single piston, so in my opinion, don't waste your time. The rotors on the Kia are 12.598" and
changing to the two piston caliper a waste of time. Now if you just want to do the conversion to say you have two piston front calipers
no problem.

 

If it nearly locks up and anti-lock activates, how much better can it get? Only if everything increases in capacity will it deliver shorter stop times, larger rotor surfaces, larger pads and more rubber to prevent the anitlock from activating.

More pistons are usually for trucks, my old arse 4Runner has 4 piston fronts, nearly stops on a dime with no loaded trailer.

 

Actually the more pistons the better for keeping the pads parallel and equal pressure applied throughout the pad area. I've got a 2700 lb car with aluminum 4 piston calipers with ABS and the braking system is extraordinaire, but for everyday driving, great if the car came equipped with the multi-piston calipers, but the trouble of doing a conversion, not worth the hassle.

If appearance is wanted, better off buying caliper covers.

 

R1 Concepts is a great brand and if you decide to go that route, please reach out and I would be happy to provide you with an additional discount on top of the discount they are providing to the public to order. Don’t hesitate to reach out if you decide to go that route…

 

I'll be doing a full stage one with tune from KSR soon, and was looking at braking improvement options to go with it, hence my post.

But wanted something that would be direct bolt-on, don't want to go the modding route. So I guess, when the time comes I'll do rotors and pads upgrade and call it a day.

Thanks for your helps and suggestions... it's highly appreciated!

 

I thought the SXL had upgraded calipers from the SX in the earlier years but could be wrong.

 

Just make sure you don't use the R1 Concept eline Rotors. Its well know its a cheap Rotor that warps.

Two other good options are. The Auto Zone Gold Rotors believe it or not. The cost is low and the Gold line are High Carbon Steel quality Rotors. They do not have a drilled nor slotted though. Also the Stop Techs are very good. They do have Drilled and/or Slotted.

My replacement upgrade for my cars are always either, AZ Gold high carbon or Stop Tech rotors with Akebono pads. Its all I ever use and its good stuff. At low prices too.

I also have a Brake pad question but I will start a new thread.