I've had a 2010 Gt for alost a year now and it has about 13k miles on it. I was wondering if replacing the spark plugs would be a good idea, i've heard of some power gains and better m.p.g. that comes with it as well. Any light that can be shined on this subject would b great help thank you. Also i DO NOT want it to void the warranty

 

If I was looking for power gains I definitely would not count on spark plugs to give it to me. If you really want to see some power gains start with a CAI and tuner.

 

haha yea i know that...lol...i forgot to mention i have a intake, tuner, a cat-back exhaust. I was just wondering if they do actually make a difference because i have heard that they do. I'm just trying to find things that wont void my warranty and the exhaust is a roush that was installed by a roush dealership so it wont, the intake wont either, an the tuner will be easy to rever bak to the stock settings. Once my warranty my co-worker and I are gonna make some custom parts(headers, X-pipe, better induction tube, etc.)

 

I would say no gain at all,save that money for something else!

 

ok thanks. I'm still gonna do some rsearch just to know though.

 

An '10 with 13K miles? You won't get anything by changing plugs except a lighter wallet.
A spark plug change won't give you any measurable power gain.

 

The only reason that I would switch the spark plugs at 13k is to replace them with a one piece design before the stock two piece ones get baked in there too much.

 

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Are you sure you have the 2 piece plugs? If you do, then I would replace them with 1 piece plugs. Sorry.

 

They changed the heads in late 08,don't have the plug problem anymore,i changed mine to a colder plug when i did my supercharger,know problem taking the out!