do i need custom tunes after muffler change

[Shorse]

i did not know mufflers had to break in... good to know.

so he can make me a tune aimed at fuel savings and performance, what form do i fill out?

[88Racing]

Originally Posted by Shorse

i did not know mufflers had to break in... good to know.

so he can make me a tune aimed at fuel savings and performance, what form do i fill out?

Goto powerhungryperformance.com click on order forms.

One note on exhaust mods. A muffler will never require a new tune. It's what goes on before that and what you have changed.

Please fill out your user info with hex/calibration code and serial number.

Lars

[Power Hungry]

The biggest difference in exhaust that would require tuning is for headers, crossovers (X and H pipes) and high-flow cats. These have a more dramatic effect on backpressure and subsequently can affect air fuel ratio.