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Every rear suspension component is inter-compatible between the generations aside from the knuckle. If every other component is the same, the knuckle should be able to bolt in directly. The only variables are the brake line, which may swap in directly or require a custom-ordered hose, and the...

Lucky. I used an XS Power D4800, maybe the battery’s shape is what made me suffer. I kept ending up with the terminals angled towards the back. I also had to modify the mounting holes to get it to bolt up. Looked at yours and I see you only used the rear 2 holes. I tried to use all three and...

Was this a huge headache for you too or am I the outlier? I had to mutilate the box to get it installed in a way that would let the terminals reach the cables. It was an aftermarket battery so maybe that’s part of it but that swap was a huge pain in the ass

Any difficulty in cleaning? I know higher performance pads’ dust can be a pain to get off. Also, have you ever run Hawk pads? If so how do they compare?

Keep us posted. Imo the upside of the minimal changes between the S550 and S650 is that we can use the new parts to freshen up our cars. I already have a 7th gen battery tray, I’m looking to steal their brakes too

I hate myself. Shoulda checked first, I was in a rush to get a new battery in. Oh well

What year is your car and what model AGM? What’s the CCA and AH rating? Because I know for a fact the battery cover does not fit over XS power’s D4700. Maybe the tray varies between years or maybe your battery is physically smaller. I do think the D4800 I’m using is slightly shorter than the...

To the stock box?? I thought it didn’t fit, I didn’t even think to try. I just finished the S650 box install and holy shit, that was so much more stressful than I anticipated. A lot of dremel work, drilling, and bullshit to get a clean fit. Got there eventually but damn, that was not fun. To...

I was surprised at how much better the Jegs pricing was than Crutchfield’s - I usually make big purchases there to build up points and for their tech support. You also threw this in an S550? How’d it go? I’m doing the install as I type this out. I had to slightly trim the tubes at the bottom...

Is venting needed for an AGM battery? And is there a vent tube on the stock battery? I’ve removed my battery and there isn’t one on my 22 or my friend’s 20. I’ll be attempting this swap over the next few days. I have the S650’s tray, just need to figure out exactly how to mount it to my S550...

Still interested, just trying to make the time to come down. Obviously no worries if someone else gets to them first

Can you give us an update in like a week on dust? Not a big problem for me at all, my silver PP1 wheels are closer to gray at this point, but I know some pads’ dust can be really difficult to get off

Second this. OP, StangTime is really the guy to go to for info on the 9 speaker system. He has a few posts with wire diagrams and build logs; I probably wouldn’t have got my system together without his resources

I’m gonna get back to you in these soon, just gotta figure out logistics to get there. Could you PM a zip or town just so I can get a rough idea of where you are?

Good info, thank you. Same torque specs as OEM hardware?

I’m planning on adding the alignment kit and bushing supports soon, I’ve already got the brackets on. Haven’t done the shocks but as long as you have the IRS supported the order shouldn’t matter between the shocks and the STH components. Only thing I would say is to save the subframe brackets...

What size wheels were these on? I want to pick up a set of 19x10/11 tridents just not sure if these would pair well

Fair enough. Keep in mind you can run just the S650 front brakes. The kit is sold on its own for the S550; might as well use it if you have it already and sell the rears.

Why the mix of Steeda springs and shocks? I've been looking at those shocks, not sure what springs I want to pair them with yet. The subframe brace is a game changer, it should really pair well with what you got on there already. It's not a night and day difference but I've driven both stock...

Fronts are pretty simple. Get a set of copper brake line washers at Autozone. They're under $10, you'll need these for a good seal between the hose and caliper. As for the hose fitment, you can a) email Steeda and ask or b) go to LMR and look at the hose numbers for their Brembo swap kit and...