Been waiting for BC to come out with a coil over kit for the AWD 3IS models. Couldn't wait anymore and decided to take a little project on for myself

Tried doing my own research online and came up short. Did a quick test fit of the 2IS Coils on the rear of my 3IS and found out that they would almost work with some slight modifications. (Rear lower mount bushing needs to be slightly bigger. Can fix with washers)

Mind you that you're relocating the spring from the lower control arm to the shock body.

So anyways. Onto my current project.

Found a set of used 2IS IS250 / 350 BC Coils for cheap.

Found a slightly used 3IS RWD BC Coilover set up for a decent price and went to work

Took apart both front coil overs to find out that the top mount and shock body both have the same dimensions. This was a huge sigh of relief.

Swapped the lower mounts over from the 2IS coils onto the 3IS coils and found out I had plenty of room to slam the vehicle in the front.

I plan to install the coil overs Saturday when I gain access to a hoist and will keep this thread updated.

Hopefully BC North America will read this and get off their asses. The 3IS only comes in AWD up here in Canada and I honestly did not feel like spending $3000 on RSR Coilovers.

Pic 1: Old cheap 2IS Coil overs
Pic 2. New 3IS Coil overs with 2IS AWD Lower mount
Pic 3. 3IS RWD Front Lower mounts on old rusty 2IS Coil overs.

 

their site says $1899.00 http://www.rs-r.com/product/lexus-is...oilovers-2014/

hope your project works out for you.

 

Works out to $2500 Canadian + $250 shipping and duties = close to $3000

 

BC Racing has an AWD IS coilovers
We sell them all the time

 

Where? Lol.

And you still only have RWD only listed for your 250 / 350 models.

 

ah...gotcha.

 

Yeah, where and how much?

 

Coils installed and the car feels great.

Have them set at 25. Might play around a bit more with them.

Just need them to settle now.

Kept the car the same height as my super downs. Will go lower in the summer.

 

Here is the link

http://jmautosports.com/bc-racing/bc...i-3730757.aspx

 

Post updated

 

will the active dampening still work with these?

 

Like 99% of aftermarket coilovers your AVS system will not work anymore.

 

I see the spring rates are high (on paper) for the BC BR coils:

F: 10 kg/mm
R: 12 kg/mm

@redline.GT or anyone else:

Is the ride firmer than say RSR springs which are softer on paper at around 5kg/mm - 8kg/mm (f/r). Not sure if this is a direct comparison and if the damper adjustments on the BC coils allow for a softer ride despite the stiffer springs. I want the dropped look as the first priority, then good ride comfort (like stock if possible), and finally handling performance. I had RSR Downs on my past IS and was pleased with them but willing to try coils for the possible improved handling/ride comfort.

 

Right now they are not comparable in terms of stiffness / ride comfort just cause I have mine set to a semi stiff set up. I'm loving them so far tho and I've got no regrets.

Just wish I could go lower right now.

I Had RSR Super Downs and they drove nice. I would still recommend them to anyone looking to grab them