X2 lol.. ill do the recording!!!!!

 

Which should I go round or oval I'm running obx longtube header and catless

 

I got the oval 16" and its nice at idle and crazy loud at WOT

 

What's different with oval and round?

 

Guess what. Yesterday I went to summit store. Bought me a borla xr1 round 15" stainless. Wait on schedule with Gary do muffler on mine. I'm chrious what it will be loud. Can't wait.

 

You will love it, its quiet at idle and cruise speeds. Once you get on it, it gets crazy loud!

 

I bet it. It won't be back pressure backfire at all? How long have you been have this borla xr1?

 

I run the 3" Si/So xr-1 oval multi-core muffler. I think it was described as "******* loud" earlier in the thread. I'd agree with that. I run it with pacesetter LTs/ORY. A little drone, and some rasp.

Its louder than I wanted. But I like it.

 

I'll be getting the 24" round with 3.5" piping...ARH LT's catless...I have a buddy with a 6.0 and that thing is super loud...He was running the 15" round at first and had a little backfire/popping...swapped to the 24" and it hardly ever pops unless he hits the gas just right in neutral...I'll post up some sound clips around August once I get the truck to a muffler shop!!

 

I have the obx's with the driver side hump and dummy cats. The muffler is the longer (16" body I think) xr-1 oval. It's welded to a 3" mandrel dynomax I-pipe with a mandrel turn down pointed out about 25* below horizon. The end of the exhaust is nearly under the axle. It's pretty loud at wot. Not really vette/borlamouth on an f-body esque if that's what you're looking for. It's got a little of that scream way up top. It has that weird yawning cruise tone like those cars do though. Shitty truck tone at mid rpms. Drones a bit, but no rasp. Maybe a cam and some more rpm will make it wail (6100 rpm shifts).
Not worth the money I paid. Shoulda had the dump welded on my new I-pipe, that was amazing without a muffler. No rasp like having the y-pipe open.
My truck "gurgles" a bit on decel when the converter is locked or it shifts into o/d after flooring it then letting off.
From what ive seen of pics of my part # muffler, they used to have an elliptical perforated metal insert in the flow path. Mine is straight through like any other brand. Might call Borla about that.