The Subaru boxer is of the horizontally-opposed flat design. That's only part of what gives it that unique sound, however, as it's more about the design of the headers. The 2.5-liter Subaru engine makes use of something called unequal length headers, which are exactly what they sound like.May 31, 2016
Why does my Subaru sound loud?
A failing or dirty sensor can send incorrect data, resulting in too much or too little fuel going to the engine. This can result in a rough running engine that is louder than normal. Bad or Dirty Spark Plugs: Bad spark plugs can cause the vehicle to misfire which will make it run louder.
What causes Subie rumble?
The header cylinders in a beefy WRX STI are set at different lengths. With cylinders 1 and 3 being slightly different in length to 2 and 4 any sound has to move in an unconventional manner through the exhaust and produces the unique rumble.
What is that Subaru sound?
That distinctive Subaru sound we have all come to know, is thanks to the vehicle's boxer engine, which is different than the engines in other vehicles. This 2.5 liter engine has a horizontal, flat design, with headers that are unequal in length.May 25, 2018
What is a SPT exhaust?
SPT Performance. Exhaust System. These exhaust systems feature full stainless steel construction with smooth mandrel bands for low restriction and that famous boxer engine sound. All systems incorporate optimized tubing diameters and exhaust tips that are polished and etched with the SPT logo.
What problems do Subaru STI have?
The WRX STI has had well-documented issues with its EJ25 2.5-liter turbocharged Boxer engine. There have been a number of lawsuits over premature engine failure due to a defect that allowed contaminated oil to carry “damaging metal debris through the engines,” according to court documents.May 23, 2020