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Borla XR-1?

7692 Views 28 Replies 9 Participants Last post by  JauntyBishop
Quick question. I'm considering changing up my exhaust setup (one final time hopefully).

I have JBA long tubes, catless bpipes and an MBRP Pro Series 304ss catback. I was thinking of swapping out the muffler and tip in favor of a Borla XR-1 with a dumped tip over the axle for a cleaner look and a deeper tone.

My question: Is there any difference in sound/performance between the oval (40944) XR-1 and the round (40085) XR-1? Both are 304 stainless, and both are single 3-in/3-out. I was under the assumption that shorter mufflers will be louder. That being said, the oval is listed as 16" x 4.5"(narrow part of oval) x 7.88"(thick part of oval), and the round is listed as 15" x 5" diameter round.

Any thoughts on differences, or anyone with firsthand knowledge on either one? I don't anticipate space will be an issue, so no worries there.
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I ordered my UQ, but sent it back before I even put it on. I liked the sound of my current setup too much, drone/CIS and all so I just figured why take the chance. And it is my only (4 wheeled) vehicle, so that says a lot. It just sounds mean as hell. (On that UpRev gets here TOMORROW!!! Can't wait to hear it after that!)

Well, I guess the clear solution is that I'm going to need to stalk you and stake out your vehicle until you start it up to drive somewhere, so I can listen and compare...

Your going to love your truck all over again once your tuned. I look forward to it for you lol
I went with the 40944 so far without the ultraquiet. I'm running the Cajun set up with reso Bpipes an love he sound. Get a lot of compliments on it.
Only thing that really drives me a bit crazy is between 16-1850 rpm or right around the drone can get annoying. If that kinda thing doesn't bug you it's the way to go.
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I'm a little bit too excited. If I wasn't working night shifts, I would be awake first thing in the morning sitting in front of my apartment door in a lawn chair, with a pen in hand ready for the signature. I swear if I don't see this package tomorrow, I will find this mailman... :ninja:

My major concern is my laptop, honestly. The battery is pretty much shot on it. When it's not plugged in, it only lasts 15-20 minutes. I hope that's at least enough juice to do a few runs at a time...because I really don't want to have to go buy a new computer, though if I have to I will lol.

Worse case maybe a small inverter would work.
But I'm sure that's enough time. Good luck man
The only way to kill the drone is with a UQ in the tailpipe but you have to remember the tailpipe must be vented outside the body or box to eliminate resonation back into the cab.

I tried about 20-30 different setups now and to eliminate drone with a 40944 it must exit.

Even with a UQ in a full tail if it does not exit outside the body line you will have drone.

Agree on the ultraquiet, just haven't wanted to lose any sound volume like I did on my nismo system with the ultra quiets. Definitely killed the drone though
It take2 two minutes max to flash your rom
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