Post by
xjmxstac »
https://forums.nicoclub.com/xjmxstac-u90733.html
Sun Feb 22, 2009 2:53 pm
Exhausts will not give you much HP without intake upgrade and vice versa. The whole concept of getting I/E mods is to let your car breathe better. If all you want is noise, you're better off punching holes on your muffler or taking off your intake box like one of our mentally challenged members in here.
As far as single vs. dual, my opinion is that it's mostly personal preference. Most reputable aftermarket exhausts out there offer more or less the same hp gains. These gains are based on how the pipes is constructed (bends, angles, configuration, material) and it's diameter and overall length, basically how much air (exhaust gases) is moved out of, or kept in (back pressure) your system.
When you shop for an exhaust, you get what you pay for. The reason behind this is the painstaking process of research and development that go into these systems. Not to mention the material used and the workmanship involved. You'll see that a lot of the knock off exhaust out there will be made out of cheaper materials and inferior quality (look at the welds). To sum it up--an exhaust that might sound loud not necessarily good, offer less if any hp gains, and might not last you to the next season.
Good Luck!