What did u do to get rid of "rasp" sound
#21
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Power sticks are not glass packs, they don't have any packing.
#24
10 Second Club
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Glasspack mufflers didn't get rid of crap on another vehicle of mine that had a raspy sounding exhaust. It was just like no muffler at all. Ill go out on a limb here and say "trust me" on the 9" magnaflow bullet muffler I used. It sounds great even through the cutout at part throttle. I know what rasp is and I ******* hate it, period. I wouldn't own a car with it as it makes a really nice looking car sound like a total piece of **** going down the road. Do yourself a favor here and take my advice.
#26
#27
I am running into some rasp with my new exhaust setup on my swap and want to get rid of it.
6.0L LQ4
CTS-V (1st Gen) OEM manifolds
dual 3" stainless piping to an X-pipe under the rear seat
Right (passenger) branch after the X-pipe is straight piped out the back with a currently closed cutout dump
Left (driver) branch after the X-pipe goes to the OEM BMW muffler which has a factory Helmholtz resonator. Closed cutout between the X-pipe and the BMW muffler.
Raspy on cold start around 1.5K, and 2.5K.
Would one of these in each of my straight lengths before the x-pipe reduce the rasp? I believe I have the room for it.
http://www.summitracing.com/parts/wlk-24248/overview/
6.0L LQ4
CTS-V (1st Gen) OEM manifolds
dual 3" stainless piping to an X-pipe under the rear seat
Right (passenger) branch after the X-pipe is straight piped out the back with a currently closed cutout dump
Left (driver) branch after the X-pipe goes to the OEM BMW muffler which has a factory Helmholtz resonator. Closed cutout between the X-pipe and the BMW muffler.
Raspy on cold start around 1.5K, and 2.5K.
Would one of these in each of my straight lengths before the x-pipe reduce the rasp? I believe I have the room for it.
http://www.summitracing.com/parts/wlk-24248/overview/
#30
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Well....that didn't work. I had a 3" dynomax bullet... Tried that..nope.. Then I put a 3" glasspack.... Nope..
This is also changing rear mufflers. I switched the glasspack from the bullet, and swapped again. Then tried a magnaflow oval, was better.. Sooo idk.
Also this is with a single 3" outlet.
This is also changing rear mufflers. I switched the glasspack from the bullet, and swapped again. Then tried a magnaflow oval, was better.. Sooo idk.
Also this is with a single 3" outlet.
#31
Old School Heavy
iTrader: (16)
It may be too quiet for your taste, but these have eliminated rasp on everything I have ever put them on.
http://www.dynomax.com/mufflers/super-turbo-mufflers
http://www.dynomax.com/mufflers/super-turbo-mufflers
#34
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I have never heard of anybody using a Borla XR-1 in the I pipe and still having bad rasp. If you want a drone-free and rasp-free exhaust then the Borla XR-1 is a proven way to go about doing it. It worked for me and It has worked for many others on this site. That is why everybody (now including me) humps the leg of Borla is because their mufflers really are that good.
I say Borla XR-1 in I-pipe, true duals with GOOD mufflers, or SLP Powerflo.
I say Borla XR-1 in I-pipe, true duals with GOOD mufflers, or SLP Powerflo.
#38
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This TSP catted y-pipe solved my rasp problems, although now it looks like they are no longer using Magnaflow High Flow cats in their current y-pipe but you may want to check if you can just get 2 cats welded in to your current setup: http://www.texas-speed.com/p-292-texas-speed-3-stainless-steel-catted-y-pipe.aspx
You may want to check out this thread for details or give TSP a call about it: https://ls1tech.com/forums/generation-iii-external-engine/1372646-what-catted-y-pipe-fits-pacesetter-longtubes.html
You may want to check out this thread for details or give TSP a call about it: https://ls1tech.com/forums/generation-iii-external-engine/1372646-what-catted-y-pipe-fits-pacesetter-longtubes.html
Magnaflow Hi-Flow Heavy Metal cats part #99659HM. I got both of mine for 169.00 shipped. 3" in and 3" out body size is 4" so only .5 inches bigger all the way around of the inlet/outlet and they support up to a 6.2L. I put 3bolt 3" header flanges on my Pacesetters and on each side of my cats and then on my pipe so I could just bolt them in. That way if for some reason you ever have to replace your cats you won't have to cut your pipe over and over. Just pope the bolts out, put in a new cat with flanges and bolt it back up.
#39
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#40
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