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Re: borla mufflers
[Re: mopar dave]
#2693994
09/03/19 02:53 PM
09/03/19 02:53 PM
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Joined: May 2017
Posts: 72
WI
Brewzer67
member
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member
Joined: May 2017
Posts: 72
WI
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I ran the oval XR1's in a 3" on my small block. Ran same numbers with and without them. They sound nice too. I had the same experience with them on my big block car (2-1/8" headers with the rest 3" as well). I lost .05 running through the exhaust over open headers. Not enough of a difference to make dropping the exhaust worth my while. They have held up awesome over the years and don't have the drone issue some of the others do. Only downside is they can sound a little mustang'ish on some builds. Not an issue on big blocks that I noticed but have definitely heard it with some small block builds. Not an issue, just something to note.
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Re: borla mufflers
[Re: dragon]
#2694290
09/04/19 11:07 AM
09/04/19 11:07 AM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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I run 3" round XR1's on my hemi, same as what others have stated, no impact to performance and I prefer the sound.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: borla mufflers
[Re: dragon]
#2694318
09/04/19 12:20 PM
09/04/19 12:20 PM
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Joined: Dec 2009
Posts: 339
Gilroy,CA.
mopardude318
enthusiast
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enthusiast
Joined: Dec 2009
Posts: 339
Gilroy,CA.
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can Any of you guys get a video with the XR1
408 Stroker 533 HP 520 FT LBS...........................1970 Dart RMS AlterKation
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Re: borla mufflers
[Re: mopardude318]
#2694323
09/04/19 12:27 PM
09/04/19 12:27 PM
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Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
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CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: borla mufflers
[Re: mopar dave]
#2694674
09/05/19 12:02 PM
09/05/19 12:02 PM
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Joined: Jan 2003
Posts: 19,361
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,361
Las Vegas
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I assume you are referring to the collector mufflers Borla sells? If so depends on the combo and power level but performance wont drop a ton if at all. I have a brand new set here
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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