Muffler Question

McLuVan · 03-18-2008, 02:34 AM

Im thinking about doing a custom exhaust
im going to get magnaflow mufflers but im wondering
which is louder...
4 inch radius
or 7 inch
im not gonna do 7
i just want to do is it louder as i go up
or louder as i go down

McLuVan · 03-18-2008, 12:03 PM

no one?

Malek@MRF · 03-18-2008, 01:11 PM

the 7 inch radius canister will be quieter than a 4 inch, it has more packing material around the flow tube to absorb the pressure wave.

But I don't believe you are looking at the proper measurements for the Magnaflow mufflers. I don't recall them having 4 inch canisters. I do know that they have 4 inch length Tips and 7 inch length tips though on their SS polished series.

Generally speaking, the longer the muffler and the more packing material around it, it will be quieter. It also depends on what type of packing material they use.

03-18-2008, 02:34 AM	#1
McLuVan Lieutenant General 304 Rep 13,114 Posts Drives: ///M3 Join Date: Jan 2008 Location: Socal~818~ iTrader: (1)	Muffler Question Im thinking about doing a custom exhaust im going to get magnaflow mufflers but im wondering which is louder... 4 inch radius or 7 inch im not gonna do 7 i just want to do is it louder as i go up or louder as i go down __________________
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03-18-2008, 12:03 PM	#2
McLuVan Lieutenant General 304 Rep 13,114 Posts Drives: ///M3 Join Date: Jan 2008 Location: Socal~818~ iTrader: (1)	no one? __________________
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03-18-2008, 01:11 PM	#3
Malek@MRF Brigadier General 731 Rep 3,735 Posts Drives: E92 M3, E46 M3, G82 M4 Join Date: Jan 2008 Location: Irvine, California iTrader: (5)	the 7 inch radius canister will be quieter than a 4 inch, it has more packing material around the flow tube to absorb the pressure wave. But I don't believe you are looking at the proper measurements for the Magnaflow mufflers. I don't recall them having 4 inch canisters. I do know that they have 4 inch length Tips and 7 inch length tips though on their SS polished series. Generally speaking, the longer the muffler and the more packing material around it, it will be quieter. It also depends on what type of packing material they use. __________________ BMW PERFORMANCE SPECIALISTS. Race Engines. Suspension. F/I. Brakes. Race Preparation. Factory Service. Alignments. OFFICIAL PARTNERS: KW. MOTON. Brembo. AP Racing. BBS Motorsport. iND. HRE. Turner Motorsport. VAC. BMW Motorsport. Facebook \| Instagram \| Yelp! \| Flikr Phone: 949-233-0448 \| E-Mail: info@mrfengineering.com
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