First off, my apologies for resurrecting such an old thread, however, I just recently came across this thread after searching the subforums. Anyway, I'm seeking advice from anyone who has any type of knowledge or personal experience with the Borla (140210) aka XR-1 multi-core Catback exhaust? My reason for concern is that several tech support reps from Borla have all recommended this multi-core cat-back system in which they claim will not produce any resonance drone on a 2007-09 Shelby GT500. They also claim that despite the fact that I own a 2006 Mustang GT with a Saleen Series VI supercharger, the Borla (140210) multi-core exhaust system will also be compatible with a 4.6L supercharged 3 valve application. At any rate, I've been running the Borla S-Type paired with the Mac ProChamber for nearly 2 years now and although I really like the overall sound from the outside of the car, however, I cannot deal with the annoying interior resonance drone between 1500-2500 RPM on the highway. Therefore I really have no other choice but to make a change. I also asked the folks over at Borla about making the switch from the S-Type to the Borla ATAK and they said the ATAK mufflers are tuned and designed specifically for only naturally aspirated 4.6L 3v Mustangs and would therefore not be recommended for my supercharged application, as the blower would change the sound of the exhaust note and also increase the volume as a direct result. Anyhow, I received the Borla multi-core system a few days ago, but I'm not quite certain as to whether or not I should install it or just return it back? As the last thing I need to be worried about is ending up with another exhaust system that I'm not going to be very happy with. Needless to say, my only other choice would be either the Roush Extreme Catback exhaust with axle-back delete pipes or possibly the Ford Performance FR500S axle-backs aka KR's. However, I would prefer either the Borla ATAK or the Borla (140210) multi-core cat-back exhaust, providing they would be compatible with my particular application that doesn't produce obnoxious resonance drone. In the meantime, I'd be really grateful if anyone might be able to provide any type of feedback and support. Thanks in advance.
https://www.svtperformance.com/threads/put-borla-xr1-catback-on-the-shelby.493307/
https://www.svtperformance.com/threads/put-borla-xr1-catback-on-the-shelby.493307/
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