Originally Posted by GGM_IS
Has anyone done the diff or subframe bushing? I'm thinking those will be the worst contributors.
I used the Figs parts for my diff (both where the "wings" off the front of the diff housing bolt to the subframe, and also the ones on the back of the diff cover. I welded in one of the Figs diff mount reinforcement plates at the same time.
Figs doesn't sell the bushings for the subframe-to-chassis, and I was unaware of StrongFlex at the time, so I filled the OEM bushings with 3M Window Weld, which is ~75-80 durometer, from what I've read.
I did the whole suspension in one shot, so I don't know how much NVH to attribute to each part... But I did poly everywhere there was rubber from Toyota, added Figs toe links and Figs Mega RLCAs that have rod-ends instead of bushings on the inboard ends.
It's not like an all-metal racecar by any means, but there is certainly more NVH than stock. For reference, I also have Bilsteins and Eibach "pro" kit.
Here is a ride-along video I recently made to demonstrate my R154 for sale. Maybe you can get a feel for the NVH in the car over my yacking:
Around 9:25, I drive over a somewhat rough section of road. You can see/hear some sub-optimal NVH characteristics through that section.