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How much more quiet is a SLP dual/dual muffler going to be than a Dynomax, Ultra Flo Welded, muffler #17227? I'm trying to quiet my setup even more when the cutout is closed. Some suggested a Gibson SS?
I have speed engineering LT's, their off road Y, and a single cutout in the I pipe. My options are limited to modifying after the cutout. What would be the best thing to put in the circled area below to quiet it down even further?
A pair of Magnaflow 14416 or 14156 in the tails maybe? A 2.5 inlet and outlet resonator that is smaller that has a outer case diameter of less than 3.5" would be ideal. I think 4" case outside dia is the lowest they make. Maybe some Vibrant 1792's.
Not sure how much quieter the Gibson will be or if a Magnaflow #12267 would be quieter.
Last edited by 5.7stroker; 11-06-2017 at 03:09 PM.
My 99TA with an ERL 416, Kook's 1 7/ LT headers & Kook's Y pipe, no cats, closed cut out and a SLP Dual / Dual is about as quiet at warm idle as a stock Z28 LS1 4th Gen with stock exhaust and cats at warm idle.
The SLP Dual / Dual is very quiet a idle or low rpm.
My 99TA with an ERL 416, Kook's 1 7/ LT headers & Kook's Y pipe, no cats, closed cut out and a SLP Dual / Dual is about as quiet at warm idle as a stock Z28 LS1 4th Gen with stock exhaust and cats at warm idle.
The SLP Dual / Dual is very quiet a idle or low rpm.
The dual dual is pretty quiet but I think he has that with the CME tips.. ? Or it looks similar to a dual dual
OP, maybe get a dual dual and add the CME to it if you don't have it already.
How much more quiet is a SLP dual/dual muffler going to be than a Dynomax, Ultra Flo Welded, muffler #17227? I'm trying to quiet my setup even more when the cutout is closed. Some suggested a Gibson SS?
I have speed engineering LT's, their off road Y, and a single cutout in the I pipe. My options are limited to modifying after the cutout. What would be the best thing to put in the circled area below to quiet it down even further?
a Hooker Aerochamber would be quieter. If yu want to keep what you got then some Borla stingers would work in the area that you circled. They are not cheap though.
I wonder if this would work then using a straight cross member instead of the lesser ground clearance double drop crossmember:
Speed engineering headers into the ARH Y pipe with the 4" merge into the 4" cutout, into a 4" to 3" reducer, into a Kooks GE-307540 cat, into the 53061 over axle I pipe, into the Dynoflow muffler I have, into the 14416's, then out the CME tips. Quiet, reduction in fuel smell, able to be loud with no restriction when needed. Maybe swap the Dynoflow out with a Hooke Maxflow or SLP dual/dual.
A 4" electric cutout coming out of the I pipe... I think I have 5" ground clearance with my current 3" electric cutout, at a ride height 1" lower than stock.
Last edited by 5.7stroker; 11-06-2017 at 10:46 PM.
Since you don't care about the flow of the catback and want it to be quiet I'd look for a used dual dual muffler. Sometimes you can find just the muffler on here.
And they don't necessarily flow bad either. But I think it will do what you want it to do for cheap and still flow decent. Probably as good as any other stock style fitment muffler or close enough.
I've got the magnaflow 12267 (stock replacement crossflow style) and a single magnaflow spun style cat after a qtp cutout and I have no rasp. The car is super mellow at idle closed cutout. It's no Prius as you can defiantly hear the car is running in the driveway while standing in the house. I love my setup and highly recommend it.
For your question Id check for used SLP LM2 resonators as people swap those out frequently for being too quiet for their taste.
11-06-2017, 02:38 PM
Quietest exhaust setup with no cats? 
as you can defiantly hear the car is running in the driveway while standing in the house. I love my setup and highly recommend it.
