[bent98]

I’ve done exactly that, my question how did you like those absolutely planted launches after 😂😂😂

You should also consider doing this as well

Steeda 555 4437 Mustang IRS Subframe Bushing Support System (15-22)

Steeda S550 mustang IRS subframe bushing support system for your 2015+ Mustang GT, EcoBoost, and V6 gives the rear end a solid feel with no increase to NVH. The Steeda IRS subframe bushings eliminate rear subframe bushings eliminate subframe movement.

www.steeda.com

 

[bent98]

I looked at that kit because one of my buddies has it. We did some driving with a go pro watching the IRS and it didn’t seem to make that much of a difference so I held off on adding it.

It helps if you plan on dragging the car. Reduces subframe flex by 1/2”

 

[bent98]

I've seen that on a GT, but the Shelby cars use bushings of different durometers. Was that measured on a GT350 or GT500?

On 500 there is no issues and it takes up the slack of the IRS. On the 350 you can’t use all the bushing

 

[bent98]

So I’m not buying a GT500 to ride like a Lincoln but I’m curious if any of you notice any harsher ride at all when you’re out cruising. If you take out some of the chassis flex would that be a bit of a side effect?

No, it doesn’t add any NVH, however if you do the differential bushing, it will make the ride harsher . I don’t suggest you do these below.

https://www.cjponyparts.com/steeda-rear-differential-adjustable-bushing-insert-system-urethane-mustang-ecoboost-gt-2015-2022/p/5554439/?year=2019&gclid=EAIaIQobChMIyNCEypSo-QIVncmUCR2S-wo1EAQYASABEgLQ6vD_BwE