Comparison Vid: Stock, Stillen, and Berk :)

spearfish25

When I first added the Stillen CBE, there was no rasp at all. The sound initially was a bit quiet and it matured, getting louder with a bit of time.

Then I added the ERZ HFCs and out the shop door it was rasp like you wouldn't believe. I cringed initially thinking I had a problem. After about 100mi, the rasp settled down immensely. The only time I really notice rasp now is acceleration with a cold engine. Once things warm up, I wouldn't call it rasp. It's more a coarseness to the exhaust tone that gives it a racecar-ish feel. JB1's berk/berk setup is loud, deep and smooth. I don't get the mechanical sense from his exhaust note that the Stillen/ERZ combo has. However, I'm OK with that as the mechanical essence adds some interesting differences in my opinion. It's not unpalatable, just difference.

Red, I don't think it's gotten quieter, but I definitely am more used to it. I started thinking I could tolerate the noise of an F.I. exhaust perhaps...but that won't happen. Having compared the car to JB1s Berk setup, the Stillen/ERZ is near the same loudness level. In the car, the Berk combo is somewhat louder but perhaps because there are more lower frequencies, whereas the Stillen/ERZ setup has a bit more higher frequencies.

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2013 Cadillac V-Wagon, RIP Z