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03-06-2014, 12:17 PM | #1 |
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What's Louder? Test pipes w/ OEM mod Perf method or OEM ACM Bypass alone?
What's Louder? Test pipes w/ OEM mod Perf method (2 pipes) or OEM ACM Bypass alone? Please let me know guys, I would love you hear your feedback regarding not only volume but also tone and drone!
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03-06-2014, 01:49 PM | #5 | |
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03-06-2014, 01:57 PM | #7 |
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Yes it is,it's the straight through method also called ACM
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03-06-2014, 02:38 PM | #8 |
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I was going to say test pipes with ACM mod but that is what I have and it's loud with a rasp after 4k RPM. It's louder because they delete the pipe from crossing in the axel back technically becoming straight pipes. Less resistance so more sound. OEM mod just replaces the perforated pipe with straight pipe.
OEM Mod below. More restriction, less sound. -------------------- ACM Mod below. Less restriction, more sound. ![]() ![]() I have to agree that this modification is loud but if you want PURE RACE CAR then ACM is the route. I love it and everyone I have met loves it. I have had compliments and shocked faces from people who spent thousands to realize they could get an amazing sound from OEM chopped up. |
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03-06-2014, 02:44 PM | #9 |
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If not plans to do TP, then go ACM method, it still is one of my favorite sounds. Was not a fan after I added TP.
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03-06-2014, 03:05 PM | #11 |
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Maybe he doesn't have extra money to throw into these items.
![]() 2011 E90 DCT White / Black, ZCP 2010 ML 350 White / Black P2 Lighting Package (Wifes) 2008 E90 6MT White / Silver (Lease End) 99 FRC Corvette 12.1 @ 115 (Sold) 87 Turbo-T 10.09 @ 137 (Sold) Sick wheels btw. |
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03-06-2014, 03:06 PM | #12 | |
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03-06-2014, 03:07 PM | #13 |
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03-06-2014, 03:18 PM | #14 | |
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03-06-2014, 03:21 PM | #15 | |
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03-06-2014, 03:49 PM | #16 | |
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03-06-2014, 04:34 PM | #17 |
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I understand both methods...but BOTH methods are an oem mod...you mod the oem exhaust...they are both pretty much straight pipes aren't they (both have closed pipes and are not emitting anything into the muffler).
In order not to create method we should be saying: (a) perforated pipe method, or (b) ACM method. These are both modded oem units. Why am I being so technical? I'm usually just a troll lol lol. ![]() |
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03-06-2014, 06:51 PM | #18 | |
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03-06-2014, 07:18 PM | #19 | |
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03-06-2014, 07:35 PM | #20 | |
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