yes, they are legal, true dual pipes are the best type of pipes that you can buy. compared to "single and a double pipes" which aren't loud at all. of course there are straight pipes which have no cat converters, but those sound like crap. so basically if you have true dual pipes you have the best money can buy
try hearders and 3" exhaust with a X pipe magna flo mufflers and 5" cannon tips
Depends on where you will be driving it.
If this question is for car of truck exhaust it is up to the discreation of the officer. The law states that the vechicle must have a catalytic converter(if so equipped from the factory) and some type of muffler. You can get away with louder exhaust in a county with no emmisions laws. If a vehicle was originally equipped with a catalytic converter, it must continue to have this critical emissions component. Headers do affect emissions and are regulated by the state. Some are legal, some are not. Flowmaster does not make headers, only mufflers and muffler systems. Flowmaster mufflers are not an emissions related component and are not regulated by law for emissions compliance. With regards to sound, how they are installed, which muffler is used and where the muffler is placed in the system affects the sound and that legality is up to the officer. Flowmaster offers a wide range of mufflers so managing the sound is not a problem, picking the right one can be if proper research is not done. Call an expert for your application. It is not a one size fits all situation.
There is no such thing as too free flowing exhaust on a 4-stroke. But, you can't get true duels on that pickup unless you move the gas tank, since it is in the way. I put cat back dual pipes with no mufflers on mine sounds titties.
keep in mind flowmaster mufflers are chambered. so they wont flow nearly as good as say a magnaflow would. so you will get more HP with a magnaflow than a flowmaster unless you put a flowmaster outlaw series on. its pretty much just a street legal way of straight piping your truck it will flow way good but it will be loud cause there is no ceramic glass packing like magnafow has.
In the exhaust pipes under the truck. In the exhaust pipes under the truck.
dual exhaust
Put flowmaster exhaust on it. It also helps to put an H pipe or X pipe on as well, but that is more money. There is alos the option of changing the headers to aftermarket (shorties or long tube) but that is more money as well. First, change out the mufflers to flowmaster, borla, etc and see how you like the sound.
it depends on if your getting it done professionally or if your doing it yourself. also depends on what kind of system your getting and if your getting just new mufflers or if your getting a whole new exhaust. i bought a cherry bomb glasspack for my truck and installed it myself. only 30 bucks. what you can also do is go to a muffler shop and get a quote.
There are a wide variety of places where on could go to purchase an exhaust for their truck. The easiest place to purchase an exhaust would be at a local car parts store.
Check your exhaust. C converter for exhaust flow issues
As far as I know, Flowmaster does not make exhaust systems for 4 cylinder cars. There are even some 6 cylinder trucks that Flowmaster does not have exhausts for. However, you can go to the Flowmaster web site and search for your particular vehicle to see what products are available for your car/truck.