no that's the good smoke. let the volvo breathe for a bit, becuase it's letting all those built-up speed particles free.

what happens is your Volvo engine makes speed particles and when they find their way out of the exhaust, it propells the car. that's why ricers have two or more tailpipes... it releases more speed particles faster.

having an exhaust that's too-restrictive will make the speed particles back up into your engine fouling up the radiator, power steering and air-conditioning. having said that, it's good to punch a few holes in your hood to let a few of the speed particles escape. Incidentally, this modification was featured in the Simpsons Episode, "Homer Simpson: Classic Clown" when he is told (rightly so) by the used car saleman that the holes in the hood are "speed holes. they make the car go faster" precisely, Mr. Salesperson, becuase speed particles are being released!

speed particles, when concentrated, make up a white smokey mist. when you see this, it is becuase dangerously high concentrations have built up in your engine, and must be released. frankly, you're lucky you didn't blow your head gasket or have your oil change itself or something. just let it vent, and you'll be OK for a while.

Gor now, punch a few holes in your car body to release more speed particles, and consider adding at least 4 or 5 more tailpipes becuase apparently your car can go a LOT faster than it is right now!

while your at it, throw on a "powered by Mugen" sticker, just for fun.