As it is the case with the 240sx exhaust, so is the case with a lot many parts and accessories that are required for making and maintaining the Nissan vehicle's looks and optimal performance on the roads. The demand for such parts is driven by the need to keep these vehicles in good shape and what is most important is to maintain their peak performance.
There is a lot of competition around for even a normal accessory such as 240sx exhaust or 350z exhaust. Though sometimes this becomes very confusing when taking a decision, it is also very beneficial for the common customer.
The competition drives down the price and drives up the service and customer support related activities. In this way those who look for the 240sx exhaust, may not only get it at a very reasonable price due to the competition, they could also get certain free services while buying from a certain place.
This principle actually applies to everything in the economy and is not exceptional to the case of 240sx exhaust or the 350z exhaust. These are just used as examples here. There are many other vehicle parts which will be fitted free for example, or have free periodic servicing, or free oil changes and so on as a attraction incentive to buy your spares from a certain outlet.
These offers are sometimes so tempting that they make people take wrong decisions. You should never compromise on the quality or brand of the parts you need to buy for your vehicle. Sometimes the offers of freebies are so good that it makes you convince yourself that making a few exceptions is not that big a deal. But remember, the deal is always a big deal when it comes to your and your family's safety and lives. And this is exactly what you gamble on when you settle for anything else. You proverbially sell your safety and that of your dear ones for a few bucks profit. Are really a few bucks, a few hundred bucks or even few thousand bucks (or all the money in the world) worth your life or that of your children and spouse?
Keep this in mind when you are offered "good" offers on spare parts. By all means check and settle for the best price available - best meaning the lowest - but make sure you do not give an inch on compromising the quality of the product. If you think that the car is not good enough, then make sure that you do not buy it just because of the price. Otherwise you could be buying another car part just weeks after the purchase.