ok i bought a subframe for my ek hatch and one of my friends is selling me a swaybar for the rear so i have the option to get a gsr or a si from him which is better??............... with blox LCA's

 

Either one, I think the gsr is 14mm (maybe 15) and si is 13mm.
I highly doubt you will feel a difference in the two.

 

EK SI = 13mm
DC2 GSR = 14mm
larger the better IMO

 

You really think your going to feel a 1mm difference?

 

koo gsr bigger but i thinks it will b better 1mm should make a difference or should i just get an eibach swaybar for si or gsr?

 

Well the Si bar fits perfectly so that gets my vote. I would stay away from the Bloxs LCA's

 

I have the si bar, and i am happy with it.
Im interested to hear some other opinons but it's only a 1mm.

 

x2
imo get a itr sway from a dealer + a sub-frame brace

 

Ok, I will try this. Assuming all similar except radius/diameter of the bar, the stiffness is, if I remember correctly, proportional to radius to the 4th power. From 13 to 14 mm diameter is about 7% larger radius. I believe that it comes out about 30% stiffer.

 

koo gsr it is.........but why stay away from blox lca? Why they no good? Wats better?

 

I think best LCA's are Function 7's. You can check availability for your EK.

 

the bloxs lca's have the location where you mount the sway bar up in the wrong spot you will need adjustable end links

 

Stick to OEM parts and model-specific bars.

 

stock lca it is i guess fits better

 

get a f7 lca or skunk2 if you realy want one, those both have the mounting spot in the right place

 

If you're running an Si sway bar you don't need a subframe reinforcement.

 

Correct, in the sense of some aftermarket brace like ASR.

However behind the subframe mounting holes some reinforcement is needed as is stock on SI and EK4, and what purpose is served by the ASR 'backing plates'.