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What's the difference between mild and aggressive crackle tune?

Posted: April 15th, 2021, 1:55 pm
by CrimsonE
And is mild safe fir stock headers with cats?

Re: What's the difference between mild and aggressive crackle tune?

Posted: April 17th, 2021, 2:34 am
by Ugnius @ VersaTune
The difference is in the ignition retard. More ignition retard gives you louder pops, but that also puts more stress on the cats. Mild tune is recommended for cars with stock cats.