Can the stock-style rear spring be used with these? Or is it a different size and not compatible?

 

how much did u plan on spending ccause http://rx7.com/ has a nice paired set of springs and struts for a descent price and a moderate drop 600 something bucks for a non adjustable shock and .8" drop in front 1.4" in the back

 

yea that wouldnt be low enough lol and no you can not use stock springs with the sleeves inless you want to raise ur car like 10 inches lmao. wouldnt work with the front stock springs at all. when i get them ill show pics how to install and show the differences between stock ones.

 

the nice thing about the FC rear, is that mazda used the 2.5" diameter spring stock, so its the same as the eibach /gc springs.

the only reason the stock type springs won't work is that they are really long and soft, but preloaded. so the stock spring for example, is like 12" but installed in the car is compressed down to like 8"

the gc/eibachs are usually about 7-8" long and not preloaded. which is why the height adjustment works.

 

^^^the more intelligant way of what i said lol

 

It took me a year but with my research I got the info on ground control coilover sleeves.

They cost. 399.99
Come with 4 springs and the adjustable perches.
The front springs are taller then rear.

Install time on rear was 10 mins each. Self explanatory to do also but does come with instructions, if needed.

Front install time was 30 mins for each. I found it was easier to remove and install the front coilovers by undoing the sway bar thus making able to move the brakes out the way.

I slidd these on stock struts. Don't do it unless poor like me. If you weren't you wld by real coilovers lol. I blew the struts prolly in 2 weeks of daily driving. Witch makes the ride kinda mushy feeling. I hit a bump and it continues to go up and down for a few seconds. Not bad but noticeable.

Upgraded to kyb 5 way adjustable. Perfect! Love the way it feels. Nice and stiff. And lowered.

The stance was lower then lowering springs offered by tein or ebach. They say 1.5 drop. I used them and can't tell of any drop. Waste of money. But is better than stock.

Ground control will let you be low but not as low as the real coilovers. I found that max makes the best ones for being "slammed".

Ground control is really a better option than cutting springs otherwise don't waste ur time. Save ur money for some nicer ones. I will soon right a review of the one coilover that gets bad rep. Godspeed.

 

Any morr detail shoot a question. Also no grinding or cutting at all folks! They made the front sleeve to fit perfect and ofcourse rear no issues