You've got the anniversary limited platnium edition

Remember tires act as springs and have a sidewall stiffness [depending on PSI] of 10 times stiffer than coil springs. Two springs in series are lower than the lowest in rate, so tires reduce wheel rate stiffness to the road by ~ 10%.

A different tire with a larger sidewall ratio can emmulate a 10-15% softer spring.

By 40k I would think the shocks are weak compared to brand new [especially in rebound/expansion stiffness].

G35Halo, do you have 17" wheels? If not, try stepping down to 17" wheels and tires. I have a set of 17s and the stock 18s for my coupe, and the ride is much smoother with the 17s, though I prefer the ride on the 18s, but that's just me. You'd save $ when you need tires. If you already have 17's, also consider the type of tire you have. A stiff sidewall will of course make the ride harsher and a touring tire would give a better ride. Some tire places will let you test drive a set of tires and take them back (for an exchange) if you don't like them. Just a couple ideas.

I agree.
Going to 17's should help it you are using anything bigger. Also the speed rating of the tire will affect the ride quality. Try V-rated or even H rated tires if you are using a tire rated higher than V. They V and H rated tires have a softer sidewall. The stiffer sidewall on a high speed rated tires also adds to the harshness of the ride.

Is it possible? More ride compliance than OEM or KYB Excels for non-sport models from the D-Specs?

I'm with you. Chicago received over 100,000 new potholes on it's roads after a couple of horrendous blizzard followed by Siberian freeze storms.

I have the standard suspension on my 2003 coupe. 17" wheels. When OEM Goodyear Eagle RS-As wore at inside of rear tires by 35K miles I switched to Goodyear Eagle ResponsEdges and ride improved somewhat.

You could try an H-rated (to 140 mph constant) Touring tire like the Goodyear Triple-Tred which I see fitted on many a BMW 5-er or MB E-class as OEM replacements. Or a Bridgestone Turanza Serenity.

Yet I am wondering if a change to KYB Excels will SIGNIFICANTLY improve ride compliance over my OEMs at 56K miles.

What do you say Q45 tech?

q45

Thanks to all who sent me their sugestions. I guess we just made a snap decision that was wrong. We have deceided to bite the bullet and sell the car, it's a shame as it only has 13k, anyone interested in buying it let me know. Thanks again
Stan S.

i believe just shock/spring essential.

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