"Free" muffler mod?
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At the risk of being ridiculed unmercifully (and/or having a bunch of people try to slam GM).... does anyone know how our stock mufflers are constructed? The reason I ask is that the CTS-V guys have a mod they have developed to pull the sound deadening material out of the stock muffler to make it louder/deeper, supposedly with no resonance issues.
All they do is drop the exhaust and use a step drill bit to make a hole (only about 5/8?). The muffler is filled with a fiberglass like material that can be pulled out through the hole ? it is a continuous strand, so you just get it started and keep pulling. They take from half to all of the material out of each muffler (they get duals from the factory). Then they use a metal snap in plug you can get from the hardware store for about a buck, plus a little high temp sealer to make sure it doesn?t leak. (I?ll find a link to the Cadillac forum if anyone is interested)
I?d be willing to try the mod, but before I drop the exhaust would like to know if the E60 muffler has a similar material inside (I?m betting that it does). If you have a muffler that is off your car and are willing to drill a hole in it, let me know what you find ? then I?ll try the mod on my car to see how it sounds. Worst that can happen is I?ll have to buy a Supersprint muffler or try to shove sound deadening material back through the hole!
All they do is drop the exhaust and use a step drill bit to make a hole (only about 5/8?). The muffler is filled with a fiberglass like material that can be pulled out through the hole ? it is a continuous strand, so you just get it started and keep pulling. They take from half to all of the material out of each muffler (they get duals from the factory). Then they use a metal snap in plug you can get from the hardware store for about a buck, plus a little high temp sealer to make sure it doesn?t leak. (I?ll find a link to the Cadillac forum if anyone is interested)
I?d be willing to try the mod, but before I drop the exhaust would like to know if the E60 muffler has a similar material inside (I?m betting that it does). If you have a muffler that is off your car and are willing to drill a hole in it, let me know what you find ? then I?ll try the mod on my car to see how it sounds. Worst that can happen is I?ll have to buy a Supersprint muffler or try to shove sound deadening material back through the hole!
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Originally Posted by slickE60' post='756740' date='Dec 31 2008, 02:16 PM
Sounds like a great idea. I'm a big fan of free mods. Your post is 8 months old now, have you done the mod yet?
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Originally Posted by mrfva' post='756755' date='Dec 31 2008, 03:49 PM
That was from Mar 10 2007, 10:17 PM
At least on the 545s, you can weld the valve on the second pipe open, which makes it a little bit deeper. I don't know if the valve exists on the 525/530.
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From: Thousand Oaks, California
My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
Originally Posted by mrfva' post='756755' date='Dec 31 2008, 12:49 PM
That was from Mar 10 2007, 10:17 PM
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Originally Posted by mrfva' post='756755' date='Dec 31 2008, 03:49 PM
That was from Mar 10 2007, 10:17 PM
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Joined: Oct 2007
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From: Thousand Oaks, California
My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
Originally Posted by slickE60' post='756832' date='Dec 31 2008, 03:12 PM
Smart a$$, why you gotta rain on my parade like that??? 
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Originally Posted by 545felix' post='756767' date='Dec 31 2008, 04:12 PM
and judging from the OP's sig, he went with a B&B, so I don't think it worked.
At least on the 545s, you can weld the valve on the second pipe open, which makes it a little bit deeper. I don't know if the valve exists on the 525/530.
At least on the 545s, you can weld the valve on the second pipe open, which makes it a little bit deeper. I don't know if the valve exists on the 525/530.
Thanks,
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