I kno this is a better question for the dealership but I was just looking for a quick answer and wanted to see if anyone else had a problem after modifying their Z. I am currently under an extended 5 year warranty on my 03 Z and I wanted to know how would putting a set of eibach springs and 20" wheels affect the warranty? what will not be covered now? will they give me a hard time if say the tranny goes bc the car is modified? has anyone had any problems with this? any suggestions?

 

it won't....unless they can draw a definite line between whatever problem you might have and the mods...rims -- I can't see any time that'd void your warranty (unless you get feathering and try to get new tires from 'em). but with lowering it, don't expect to get any service for alignment issues, or anything with your shocks/struts.

but the tranny should be fine, I would think. but under the extended warranty, they only really cover things that "cause a breakdown" or something pretty limited like that

 

New wheels - no.
New springs - maybe. But consider that suspension components are generally wear components, and not replaced for free anyway.

 

wheel: no more free alignment and feathering issue
Spring: no more suspension warranty.

 

i dont think i ever got free alignments anyways