Bull Run
Well-Known Member
- Thread starter
- #76
Lightweight exhaust mod
I'm now at a point where I'm willing to change the looks and sound to gain additional performance.
I used the Decibel X app on an iPhone to measure the noise difference between my current setup and the new setup. The first bump in the graph is for the noise inside the car, while the second bump is about 5 feet away from the rear bumper.
Corsa 3" catted DP -> Borla Pro XS (3" inlet, dual 2.25" outlets) -> 2.25" EB piping -> GT mufflers
Avg: 86.3
Min: 74.6
Max: 97.1
Peak: 99.9
Corsa 3" catted DP -> MangnaFlow XL (3" inlet, dual 2.5 " outlets) -> 2.5" dump pipes.
Avg: 99.4
Min: 73.6
Max: 111.5
Peak: 113.9
As expected, there was some noise increase over the original setup, but the exhaust sounded pretty good. Even my helper thought it sounded good for a four banger.
Weight savings:
GT muffler (18.975 lbs or 37.95 lbs/pair)
MagnaFlow XL muffler (9.75 lbs, shorter and about 2 lbs lighter than Borla Pro XS)
Weight savings vs. original: 39.95 lbs, more like around 55 lbs since mid-muffler back piping and tips are also gone.
I'm now at a point where I'm willing to change the looks and sound to gain additional performance.
I used the Decibel X app on an iPhone to measure the noise difference between my current setup and the new setup. The first bump in the graph is for the noise inside the car, while the second bump is about 5 feet away from the rear bumper.
Corsa 3" catted DP -> Borla Pro XS (3" inlet, dual 2.25" outlets) -> 2.25" EB piping -> GT mufflers
Avg: 86.3
Min: 74.6
Max: 97.1
Peak: 99.9
Corsa 3" catted DP -> MangnaFlow XL (3" inlet, dual 2.5 " outlets) -> 2.5" dump pipes.
Avg: 99.4
Min: 73.6
Max: 111.5
Peak: 113.9
As expected, there was some noise increase over the original setup, but the exhaust sounded pretty good. Even my helper thought it sounded good for a four banger.
Weight savings:
GT muffler (18.975 lbs or 37.95 lbs/pair)
MagnaFlow XL muffler (9.75 lbs, shorter and about 2 lbs lighter than Borla Pro XS)
Weight savings vs. original: 39.95 lbs, more like around 55 lbs since mid-muffler back piping and tips are also gone.
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