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05-18-2019, 06:20 AM | #1 |
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X-pipe dilemma
Hi all
My car has a Borla ATAK catback which, imo, gives off a great V8 tone. Nice bassy rumble at cruising speeds and then it quiets down in the higher revs. In my search to make the car a bit louder I just added a Remus H-pipe which kept the primary cats in place but eliminated the secondary cats and resonators. The Remus pipe is one of the less popular mid pipes/x-pipes out there so I was taking a bit of a gamble on it. My hope was that it would enhance the tone of the ATAK without being too overbearing. So I’ve had it one for a week now and it is fairly obnoxious. Sounds like a nascar at low speeds and cruising, almost like a cammed hot rod. Worst of all it has so much rasp at high rpms it sounds like a tommy gun going off. It’s actually embarrassing when merging onto a highway or accelerating in any meaningful way. I could almost deal with the low speed nascar sound but the brutal rasp when getting on it is not sustainable. Now I know just removing it and going back to the stock x-pipe will be too quiet so I am thinking of either modifying the Remus h-pipe by installing some resonators (so my setup would be primary cats and some resonators, effectively only deleting the secondary cats) or modifying my stock x-pipe to delete the resonators only thereby having the primary and secondary cats only. My question is which reduces high rpm rasp more, the secondary cats or the resonators? I have searched and seen contradictory info. Thanks!
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05-18-2019, 07:19 AM | #2 |
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05-18-2019, 10:37 AM | #3 |
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I was in a similar position. I had the ATAK on my e92 m3 by itself. Loved the sound. I then put on a quad resonated catless xpipe. It sounded decent but too loud overall and therefore I decided to sell the ATAK and get the bomiz valved rear section.
Doesn't help you much as I didn't find a solution where I could keep the ATAK but just accepted that I needed to get rid of it. |
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05-19-2019, 11:23 AM | #4 | |
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Quote:
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05-19-2019, 01:09 PM | #5 |
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The resonators are what remove the rasp. Just cutting out the secondary cats at a muffler shop and welding straight pipes in probably would have been what you wanted. Retain the resonators and the borla atak would just be a bit louder.
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05-19-2019, 02:55 PM | #6 |
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I would add resonators to the Remus but if you don't want to hack it up, secondary car delete is probably what you're looking for.
FWIW, I did a resonator delete on my stock x pipe with M Performance Exhaust and it sounded pretty good but had a lot of rasp when getting on it. I since then installed test pipes and the combination of that with the resonator delete was too loud and raspy. I put the resonators back in and it is perfect IMO. Less rasp but similar volume to the resonator delete.
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