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I have a dumb question. GM has offered a performance exhaust, shorty headers and shifter for this car. Like most we ordered from the factory but due to circumstances beyond our control we had to change because it was not available. SO let me ask, if these mods were available from the factory would the ar have been any differently tuned, also since they are now available from GMPP it seems like it will not void the warranty if I am correct in my assumptions. What do you think
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