 Tail pipe inserts |
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| moggy |
 Jul 3 2014, 03:33 AM
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#1
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Member  Group: Members Posts: 192 Joined: 15-December 04 From: Wales Member No.: 3,285  |
Hi guys
What's the significance of the insert inside the end of this tailpipe? (IMG:http://www.914world.com/bbs2/uploads/post-222-1372820267.jpg) I see it a lot on big vintage 911 engines too. Is it there as a noise control solution, breaking up the sound wave in some way? or is there something else going on? |
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| '73-914kid |
Jul 9 2014, 08:11 AM
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#2
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Senior Member Group: Members Posts: 1,473 Joined: 1-November 08 From: Vista, CA Member No.: 9,714 Region Association: Southern California  |
The story I always heard was that they were to prevent the pipes from getting pinched closed if the car was tapped from behind. Given how far 911 megaphones stick outward from the bumper, it's not a bad idea to have them installed.
BTW, I ran my car with 2 sets of megaphones of the exact dimensions. 1 pair without cookie cutters, and 1 pair with inserts. No difference in sound, power, or anything of that sort. |
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Posts in this topic
moggy Tail pipe inserts Jul 3 2014, 03:33 AM
wndsrfr
Hi guys
What's the significance of the inser... Jul 4 2014, 09:18 AM
crresind This is called "cookie cutter exhaust". ... Jul 4 2014, 09:51 AM moggy
This is called "cookie cutter exhaust".... Jul 7 2014, 03:43 AM campbellcj I thought it was simply to make the pipe stronger.... Jul 5 2014, 10:24 AM Cap'n Krusty A long time ago, these were called anti-reversiona... Jul 7 2014, 05:50 PM zymurgist PitGkp1ncXE Jul 9 2014, 11:32 AM Seabird
PitGkp1ncXE
Laughed my butt off when that video... Jul 9 2014, 02:28 PM |
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