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Old 05-28-2012, 01:26 PM   #18
PMJ
Seeking 9s on M6...
 
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I appreciate everyone's comments, i know this topic is covered frequenlty in this forum. 1 more question...

Has anyone successfully removed the drone from a Flowmaster American Thunder cat-back system on a LS3 using j-pipes? If so, can you post pictures?

I have found picture of successful Flowmaster Outlaw j-pips, and pictures of unsuccessful American Thunder...but yet to find a picture of a successful American Thunder j-pipe.

I'd like to make sure i have a chance of success before modifying my current system...the alternative of course to resell and go with Corsa or Solo...but i really like the American Thunder sounds...
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Old 06-10-2012, 01:48 AM   #19
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Drone issue Resolved!

So it seems like i talked to everyone in town, and no one recommended J-pipes to fix my drone. I could not even get anyone to give me an estimate...they wouldn't even try on my dime. Finally I found a place that would give it a go...Christian and Wayne at a local Meineke Muffler on Jones Rd in Houston.

I think they thought I was crazy, but they were willing to humor me; so we started cutting and bending pipe to the specification of the Helmholtz chart...my drone was worst at 1900, so we built to 26.5" exact (see chart above).

Below i have the pictures of my j-pipe design and some install pics. We used 2.5" stainless steel pipe. I'm happy to say the drone is gone!

Christian and Wayne are now open for j-pipe business in the Houston area!
================================

Here is the J-Pipe i designed...we cut the pipe at 28.5", made the first bend ~65 degrees, and then cut 2" off the short side of the bend. The second bend is 90 degrees and at an angle to go around the muffler at an upward angle...



Muffler before:


In progress:


Final results:


Completely hidden from behind:
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Old 06-10-2012, 03:29 AM   #20
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very cool, good job, glad it worked, knew it would!!
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Old 06-10-2012, 07:41 AM   #21
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And the beat goes on!

Let those who will cut and bend pipe have great sounding vehicles (this stuff works on anything with an exhaust and a drone problem).

Really glad it worked out for you and the muffler guys who were willing to try something "new" to them. Now they "know",too.
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Old 06-10-2012, 08:13 AM   #22
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Changed my American Thunder cus of the drone and got me CORSA. Wish you had this info up before hand lol
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Old 06-10-2012, 12:36 PM   #23
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Glad it worked. Your experiance with people looking at you as if your crazy is probably normal, most dont know about J pipes though GM uses them on our car's and others for years. I love my outlaws now, at a show yesterday two members and a new guy heard mine and want to switch from super 40's to the outlaw!
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Old 06-10-2012, 02:02 PM   #24
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I'm glad it worked for you. You'd think Flowmaster would just start selling them like that since it's such a problem.
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Old 06-12-2012, 01:55 AM   #25
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Flowmaster's intension is to have the DRONE! lol otherwise you have other alternative exhaust systems
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Old 06-12-2012, 06:47 AM   #26
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Two words: profit margin.
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