Originally Posted by subbykid
your changing an aspect of your car. Brakes you woulnt have to obviously. But any performance thing I would. So that your ecu knows what to do and by how much. You were trying to make it spool quicker, just like when you do an ehaust or intake. It needs to be compensated for.
I say take off the heatwrap and put it on your headers and upipe.
im not going to bother wrap anything. ill keep the downpipe unwrapped witha heatsheild and ill keep the stock heatsheilds on the headers and up-pipe. i dont plan on upgrading the headers on up-pipe on my car