The JCW suspension came with mutiple different replacement nuts. In the factory instructions it states that "All Fine threads must be replaced".

The only nuts I know that I replaced were the to locking nuts that hold the rear springs / struts together. The ones that go on top of the rear spring perch.

Is it absolutely necessary to go and replace some of the bolts that I had to take apart/back together with the new ones? I torqued all the real major ones to spec. The bolts on the swaybars were just torqued as tight as I could get them because they had to be tightened with both the 5mm allen and a wrench.

Lastly, how are the nuts on the top of the front and rear perches suppose to be tightened? I used my electric impact wrench...

 

Ouch...other threads say that you can snap the shock stem using an impact wrench to tighten that nut. Hope yours is OK.

When I change my shocks, I used an allen wrench and a 13/16 socket and just tightened them the best I could. Never had a problem. This included track days and autoXs.

There is a really good DIY thread for this:
https://www.northamericanmotoring.co...ll-how-to.html

 

Thanks for the heads up in the future. They tightened up just fine. Its an electric impact wrench so its not going to get as tight as a really high capacity air driven one. Other writeups (one from Alta that I used), said to use the impact wrench.

 

impact on a low setting, no more than 50 lbs, is fine.