So I had a Berks high flow cat coupled with an invidia gemini catback exhaust. As seen in many threads, this catback was extremely quiet and so I decided to replace the mufflers with a straight pipe. My question is does the straight pipe break in at all? By that I mean when I drove the car initially and cruising on the freeway, it sounded fairly ricey and raspy past 2.5-3k rpm and was wondering if over time will the raspiness get any better/go away and if the exhaust will quiet down a little if it gets broken in. So far I'm loving the volume of the exhaust although it is a tiny bit too loud for my liking and the raspiness is a bit too much. The both the stock resonators are still on it, the only thing that was removed was the mufflers from the axle back.

 

I did the same exact thing with my stillen exhaust(with headers and testpipes) and it cut the rasp down by a lot. There was no sound difference after having it straight piped for a few days compared to the first start up.. Rasp for me is about 3k-3.4k . You could unbolt the new straight pipe section and see if there is a difference.

 

jeebus

 

That's like buying a Porsche and then putting a Pinto engine in it.. But to answer your question. No, it's not going to break in. If anything, it will get a little louder in time because of the accumulation of carbon deposits on the inside of the pipe, reducing its diameter.. but very minimally.

 

I'll take that muffler just in case you were just gonna scrap it 😏.