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RodsGreen10 · 06-02-2016, 12:02 PM

The Borla Pro XS mufflers are quieter than the Borla XR1 race mufflers. But I got the bigger version of the XR1. They make a 12" and a 16". My exhaust is a full 3" X pipe custom mandrel bent tucked tight as it can go.

06-02-2016, 12:02 PM	#116
RodsGreen10 Registered User Join Date: Jun 2015 Location: Richmond,KY and Knoxville,TN Posts: 1,584	Re: 85 GMC Sierra "Scarlett" The Borla Pro XS mufflers are quieter than the Borla XR1 race mufflers. But I got the bigger version of the XR1. They make a 12" and a 16". My exhaust is a full 3" X pipe custom mandrel bent tucked tight as it can go.