Muffler choice opinions

Ported heads 226/232 112 lsa longtubes single 3" w/resonator (no cats) currently Dynamax oval 4 x 14 ultraflow. Too quiet. Looking for louder idle not too loud on wot no rasp. Who's running what?

comp cam 222/224 112LSA on '97 5.7L LS1 with TPC tubular manifold to patriot collectors to 4" flex joints that go to flowmaster 2.5"/3.0" y scavenger pipe all the way back to my S type borla 350 which is supposed to be made for this engine so no drone and just good throaty sound.

Borla has 3 models touring which seems to be somewhat quiet but present at WOT, and then S type which is middle of the road and definitely heard at idle and anxious at WOT, and then they have the ATAK series which is just obnoxious at all levels I think.

I truthfully haven't heard any of these in person just found that based on my research and dimensions that it was going to be a great fit. And after building the exhaust myself with my fluxcore welder I can verify the fit was quite good.

some pictures for show and tell.

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remaining pics and links

this video convinced of my purchase.

borla crate muffler for ls3 youtube vid

here's the specs and part number of what i got.

borla 350 s type specs & PN

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I typically use the Magnaflow mufflers. Not real loud, but have a deep throaty sound. The Borla type s mufflers are too loud and raspy sounding. Almost every one of my clients that had the borla, hated them. I have almost brand new borlas here that i've removed for better sounding mufflers

Hmmm well looks like I might be validating my known reputation on the block for loud and obnoxious vehicles with my crate muffler 350 even with the middle of the road s type.


Whooops.

Too late now it's mine and no returns. See what happens on fire up, worst case I add a resonator to pull it back to touring noise levels....

Gutterboy wrote:Hmmm well looks like I might be validating my known reputation on the block for loud and obnoxious vehicles with my crate muffler 350 even with the middle of the road s type.


Whooops.

Too late now it's mine and no returns. See what happens on fire up, worst case I add a resonator to pull it back to touring noise levels....

Loud and proud

Bob, have you specifically had the crate muffler 350 as an s type with part number 400840?

Or is it just that you have had many borlas to date and none of them were liked or worked?

Prepping myself for potentially having to swap out if I don't like it either... Lol

Part number 400843 Borla crate muffler

Lol your part number is merely the offset on inlet and center on outlet and is an s type, whereas I took dual offset to match factory placement.

So you definitely have had the exact same one. Maybe my flowmaster will help scavenge and tame the rasp to be liveable?

Oh well just try it and see, worst case get a second muffler. Lol

This is what I found.There is a 200k ohm variable pententiometer (tested bad btw)wired to tach. 1. anyone ever seen this? and would this being bad be cause for
non working tach? 2.fyi working backup cluster also does not work and has no tach bounce. 3. Plan to replace pententiometer w new same and see. Other thoughts?