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RandomTech exhaust question
Old August 19th, 2013, 11:43 PM   #1
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RandomTech exhaust question

So, I picked up my '01 GTS a few weeks ago and absolutely LOVE it. It was stock, so I put on smooth tubes and drop in K&N filters. Then my exhaust came.
I spent this weekend putting in the M&M headers and RandomTech hi flow cats and full cat back exhaust. I drove it up and down the highway a little ways on open headers, which was absolutely ridiculous, by the way. But, I had to, right?

Anyway, I've got the whole setup in and verified there are no exhaust leaks anywhere. I started buttoning everything back up, but the side cills won't fit around the larger muffler. Has anybody else had this problem? Do I need to remove some of the heat shielding? I really don't want to unless I absolutely have to. Even then I don't think I'll want to.

As a side note, the exhaust sounds amazing.
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Old August 19th, 2013, 11:46 PM   #2
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Can you take a pic of it?


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Old August 20th, 2013, 12:09 AM   #3
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Picture

Yeah, there should be one attached now.

I wanted to mount the muffler a little further back, but with where the bend is in the pipe behind it I couldn't.
I can get the top of the side sill screwed in loosely, but the bottom holes don't meet. I can see on the heat shield inside the sill where the front of the muffler is pressing against it, and it's not just on the top or the bottom, but all the way around. Maybe I can adjust it somehow so the muffler is closer to the body a little bit? I'm not sure how to even start something like that, though.
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Last edited by Salty; August 20th, 2013 at 12:19 AM. Reason: Added further explanation
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Old August 20th, 2013, 12:27 AM   #4
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As you can see from mine it's back more. That's what is recommend, since the sill gets larger there


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Old August 20th, 2013, 12:35 AM   #5
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Originally Posted by 2002_red_gts View Post
As you can see from mine it's back more. That's what is recommend, since the sill gets larger there
Is yours a RandomTech muffler? From the pics it looks like mine is a good bit larger. Mine is a few inches forward of the mirrors, where yours is a couple inches back. I didn't have nearly that much room, even if I cut the back tube and welded the back of the muffler directly to where it straitened out.
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Old August 20th, 2013, 12:39 AM   #6
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I'll loosen the front and rear band clamps and see if I can push the muffler back at all. Maybe even a quarter inch would help? I'll play with it after work tomorrow and see what I can do.
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Old August 20th, 2013, 02:36 AM   #7
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I'll loosen the front and rear band clamps and see if I can push the muffler back at all. Maybe even a quarter inch would help? I'll play with it after work tomorrow and see what I can do.
Mine is borla, try that a 1/4" might help


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Old August 20th, 2013, 06:11 AM   #8
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I don't think it is a good idea to remove heat shield or have it super tight against it.
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Old August 20th, 2013, 06:58 AM   #9
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They are all super tight against the heat shields. Just keep pushing and moving stuff around, it'll go on. The shield isn't "rotating down" when you put sill on, is it?
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Old August 20th, 2013, 07:04 AM   #10
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Or, ditch the big ass mufflers for something that is more manly man like, and will keep your car cooler too with better airflow while pissing off the neighbors
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Old August 20th, 2013, 10:11 AM   #11
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I put those big 6" round RT mufflers on my GTS, they'll fit but it's a tight fit........ it will also heat up your sills a bunch..... I swapped 'em out for 4" round magnaflows - much better.
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Old August 20th, 2013, 09:23 PM   #12
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I put those big 6" round RT mufflers on my GTS, they'll fit but it's a tight fit........ it will also heat up your sills a bunch..... I swapped 'em out for 4" round magnaflows - much better.
I assume you're referring to the Glass Packs? Found them for about $50 a piece, which really isn't bad.

How was the fit? Are they close to the same length as the RT ones with both ends flared so 3" pipes will slide in with ease? Or will I have to pound it in there? Or, will I have to get a butt connector hose clamp?
The latter being the least desired outcome, of corse.

Will I need to have my pipe extended?
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Old August 20th, 2013, 09:44 PM   #13
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Okay, so a beer can is exactly 5" tall. The RT muffler is almost exactly 4 beer cans long. Meaning the muffler is 20" long. I have the cat coupled to the header with about 2" to 2.5" overlap. So, with those dimensions I won't need any pipe extensions.
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Old August 20th, 2013, 09:50 PM   #14
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Quote:
Originally Posted by Salty View Post
I assume you're referring to the Glass Packs? Found them for about $50 a piece, which really isn't bad.

How was the fit? Are they close to the same length as the RT ones with both ends flared so 3" pipes will slide in with ease? Or will I have to pound it in there? Or, will I have to get a butt connector hose clamp?
The latter being the least desired outcome, of corse.

Will I need to have my pipe extended?
no, i went with 4"round magnaflow mufflers in the sills (4 of them - no cats) & 2 - 5" round magnaflow mufflers out back with belanger headers to complete my 3" exhaust.... I used a muffler shop to have it all welded in, sounds good & no side sill heat:
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Old August 20th, 2013, 10:01 PM   #15
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Quote:
Originally Posted by Salty View Post
Okay, so a beer can is exactly 5" tall. The RT muffler is almost exactly 4 beer cans long. Meaning the muffler is 20" long. I have the cat coupled to the header with about 2" to 2.5" overlap. So, with those dimensions I won't need any pipe extensions.
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Old August 20th, 2013, 11:02 PM   #16
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I just ordered a pair of Magnaflow 3" in/out 4" dia Glass Packs with 22" overall length. Should have them Friday. I just hope they don't end up sounding like a "raspy turd" being matched with M&M headers and an RT cat-back minus the mufflers.

As a side note, Moparracing, where in WA are you?
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Old August 20th, 2013, 11:13 PM   #17
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Quote:
Originally Posted by Salty View Post
I just ordered a pair of Magnaflow 3" in/out 4" dia Glass Packs with 22" overall length. Should have them Friday. I just hope they don't end up sounding like a "raspy turd" being matched with M&M headers and an RT cat-back minus the mufflers.

As a side note, Moparracing, where in WA are you?
well, you've got my video as to what it will sound like. The RT was just stupid loud for my liking & to keep down cabin drone, i added all those mufflers. Your's maybe quieter because of the cats, i don't have any.

My location is in SW Wa, accross the river/border from portland, oregon.

as a side note, didn't like glass packs http://www.summitracing.com/parts/mpe-18129/overview/ (tried @ muffler shop), i went with the following:
4" rounds:
http://www.summitracing.com/parts/mpe-14419/overview/

5" rounds:
http://www.summitracing.com/parts/mpe-14867/overview/
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Last edited by moparracing; August 20th, 2013 at 11:29 PM.
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Old August 21st, 2013, 07:24 AM   #18
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A little late to the party, but here's my RT cats with Corsa cat-back...



...stock exhaust...

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