BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)


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      04-09-2012, 10:46 PM   #23
Gangsta D

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Drives: '12 e88 128 vert/ '14 e84 X1 s
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To me the mod gives it a deeper rumble at the start up, and I can really hear it is when going down the road and letting off of the accelerator [it makes more of a deeper rumble] sounds oh so good.
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      04-12-2012, 01:51 AM   #24

Drives: 130i
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Originally Posted by JimD View Post
I think it is worthwhile but I tested the result with my radio shack sound pressure meter. It only really increases the loudness at cold start. Once the engine is warmed up, there was no difference. With the golf tee = louder at cold start but no different once warmed up. Still for no cost = worth doing.

volume != frequency

you should also notice more noise on the over-run, a few pops and crackles. satisfies til i can afford a proper exhaust
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