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Right now I have the LG Pro long tube headers, off road x-pipe. I plan on adding to it the Borla straight pipes in place of the mufflers.
Will I have issues with backpressure, essentially not having enough of it? I have always heard about the imfamous valve warping..or something along those lines.
Seemed that the answer was that ---- because of the length of the exhaust system----- cold air would not reach the valves and therefore cause no problems.
The issue is that upon shut off cold air is sucked into the engine causing valve warping (eg extreme temperature change).