Snap Crackle Pop Sounds / Rear Light Fog

[dannycwu]

Sorry this may be a dumb question but is it normal for our cars to make that snap, crackle, pop sound like metal cooling down when we shut the engine off? Is it coming from the driveshaft to the rear wheel drive? Just wondering that's all. Hope it's not something costly/bad! Also, I know the front headlights fog up but my rears do also after I wash the car. Is this normal and is the procedure for fixing this (in FAQ) the same as front headlights? Thanks!

[SKperformance]

yah the noise is the exhaust cooling down

[AWJ]

It is your heat sheilds. All SC's do it. Except ones with heavily modified exhaust and removed heat shields like mine.