You may want to look at the Stillen or Fast Intentions. Both are quieter than the other popular options out there (ARK, Motordyne, GTAHUS, etc). My roomate has the Fast intentions and I've owned the Stillen.

 

A day late, but I washed my car...at a track event. The first three sessions were wet with the second session in a bit of a down pour. I was amused to find tree detritus on my rear bumper that had flushed out of the top channels.

Michelin PSS worked amazingly well on the wet track.

 

What are you running now?

 

Tried to change my center caps to the Infiniti logo. Looks OK.... I was not expecting the Forgestar logo to be so pronounced from underneath. Not sure how long these will stay on the car.

 

Finished up around 11:30 pm so I barely made today's cutoff. Installed the rear Tein basis coilovers. Drove around the neighborhood and all is quiet so far. Settled in at 27-1/4" right now. Was sitting at 28" stock and right after install. Hopefully swapping out the fronts tomorrow morning.
I have a 3" step up into my garage and as I eased in I could definitely tell the rear was stiffer. Anxious for the complete setup. One question: what's the best way to tighten the nut on the piston rod holding the top plate on?

 

Hold the shaft with a locking wrench. It shouldn't scratch it. Definitely important to get that right on the rears. That was a source of noise for me.

I am also sure your height will change when you get the rear done. I'm at 26.5" all around

 

Finished install. It's HARD on jack stands without air tools! Stripped the big nut on front passenger strut lower mount. Couldn't break it loose for the life of me. Went to nearby Kauffman, they removed and replaced for free. Rears at 27-1/8 currently. Fronts at 26-3/4.
Kauffman any good for alignment? They want $129 for vehicles with lowered/aftermarket suspension. I've used local shops with my Maxima over the years and it came out worse than it went in!

 

On Friday, I had an appointment at Soho Motorsports to get my Whitline Diff Bushings installed. Here's some pics they took of the car while working on it.









Also had a more local shop flush/replace all the fluids in the car (which had never been done, and the car has 82k on it now) and what a difference. The car is so smooth compared to before. For anyone with high mileage, I seriously recommend forking out the $$ and getting this done.

 

Was your center bushing ruptured or was this preventative maintenance?

 

As you can see in the pictures, I do not believe it was ruptured. However, whenever I would start the car and put it into Reverse/Drive, I would get a nasty 2-3sec vibration from what sounded like the driveshaft shaking. Not 100% sure, but I think the diff bushings being worn out were allowing the VLSD to wiggle around more than usual, causing this noise.

Performance-wise, I like to drive in Manual Mode when I feel like pushing the car, and when I shifted sometimes, the car would jerk harshly and felt loose. The Whiteline bushings helped with the shifting and the noise, as well as flushing the transmission/VLSD and replacing the fluids. The noise seems to have been minimized, and as I said, the best word to describe the car now is "smooth."

 

How much did the shop charge you to swap bushings?
Just asking because I'm doing this soon but have had prices ranging from $300 to $800 for labor alone.

 

I had the same problem with mine. I spent 4hrs and $100 driving to shops looking for someone to just assemble the damn things. 1 shop out of 9 would finally do it.

 

They charged me $399.99 plus tax for the job, which seemed alittle expensive considering the Whiteline bushings only cost $90 off Amazon. Honestly though, I feel like it was a fair price when I saw how much labor it required and they did the job in just over 2 hours, which seemed quick.

BTW, for anyone looking into this, the part number for the bushings is KDT911

 

I did this on jackstands, took about 3-4 hours with a beer/lunch break. After doing it myself, I would probably opt to pay for a reputable shop to do it. It wasn't terrible but I'd pass on a round 2. I'd expect to pay around $400 due to most shops charging $100/hr for labor

 

$400 seems fair to me, too. It's a b1tch of a job.