magnido45

Will the lighter aftermarket performance over axle systems like Roush and Kooks that are close to 20lbs lighter than the stock mufflers, make any
difference in the way the rear end's suspension feels/performs? Like going over speed bumps, etc...

WJBertrand

No more difference than placing or removing a duffle bag in the trunk I suspect.

magnido45

hmm...now that I think about it...I could remove the spare tire and test it out...

artdohc

No it won't.

If you are that worried about it, move your battery to the trunk. It'll add weight to the rear and remove weight from the front, giving you better weight distribution.

audioAl

I have a full spare in my trunk, barely fit in the well, but well worth it, well,well. Dang!

BrazenStang

Short answer: No.

Long Answer: If you are concerned about shaving weight in every possible location, then a -20 lb. change will definitely help with your weight shaving goal. Based on the total weight of a vehicle you would need to shave a substantial amount of weight to notice a difference in handling. Bags and gear in the trunk can easily weigh more than 20 lbs. so I don't think you have anything to worry about.

Norm Peterson

Theoretically there would be some small difference(s), just that they'd be too small for most peoples' butt-dynos to distinguish.

If you're one of those rare people who really could reliably distinguish vehicle dynamic differences between the two exhaust systems without knowing which was on the car you should probably consider applying for a position as a factory or race team test driver.


Norm

magnido45

I currently don't have the driving skills, but I do have the butt-dyno...what a cool job that would be