HI everybody.I bought a 2004 commemorative edition last nov.When I bought the car I did not look at the tires very well.The car had 32k on it.Even with the active handeling on when the car shifted to 2nd gear it would turn sideways.So I bought some sticky tires for it and it grabs the road much better.I still have not even did a burn out yet.I had the vortex ram air system installed.I installed the throttle body bypass kit on myself.The car is a auto with 3.15 gears.When do you recomend the plugs to be changed and at what gap.I bought factory Iridiums from the dealer.Would a after market X-pipe and mufflers make a noticable diffrence.The dealership said if I install headers it would void my extended warrenty.If there is any thing you guys can think of with out killing my warrenty I would greatly be thankfull.I had a low 11 sec f-body that became to painfull to drive.I have a spinal injury from the ARMY.Secound is there a big diffrence from the factory ls1 in my camaro vs my 2004 ls1 vett.Thanks for any help.

 

I think your plugs are just fine. many C5 owners have changed their plugs at 50,000 miles, only to discover that the originals still looked great. An aftermarket CAT-back will make a significant difference in sound. The cat-backs with the best sound also produce a bit a resonance - not enough to bother most people unless you regularly take long trips. I love the Borla Stinger sound - low rumble at idle and semi-exotic WOT sound. An X-pipe will tone down the popping, but I kinda like that sound when I downshift.
The LS1 is the C5 breathes better than the same engine in a Camaro - hence the slightly increased HP.
Warranty: According to warranty companies, almost anything that is not stock "kills" the warranty. How could headers cause a water pump to fail? I can understand how a starter may fail due to higher temps because of headers, but not a water pump! Still, you should determine how risky a mod is before installing it. Many C5 guys get intake, exhaust, and shifter, but others go hog wild with supercharger, etc.

Dave