LM 2 Muffler restrictive?
LM 2 Muffler restrictive? I just got my LM 2 exhaust today. 
Aside from the fact that Fed-Ex practically destroyed the box it came in and dented one of the tips, 
I was suprised to see how much the muffler necked down on the inside. Obviously it is a straight-thru design, but I'm concerned that smaller inner diameter is going to restrict exhaust flow eventhough the rest of the exhaust is 3". You guys have any thoughts on this? BTW as of right now the car is on stock manifolds, but I'll probably be going long tubes with a catted Y in the future.
Aside from the fact that Fed-Ex practically destroyed the box it came in and dented one of the tips, I was suprised to see how much the muffler necked down on the inside. Obviously it is a straight-thru design, but I'm concerned that smaller inner diameter is going to restrict exhaust flow eventhough the rest of the exhaust is 3". You guys have any thoughts on this? BTW as of right now the car is on stock manifolds, but I'll probably be going long tubes with a catted Y in the future. 
TECH Fanatic
Joined: May 2005
Posts: 1,135
Likes: 1
From: The 'Burgh, PA
The restriction will be minimal, and is necessary to muffle the sound more effectively than the LM1 resonator. I think that you will like the sound - I have the LM2 on manifolds and an aftermarket Y and it sounds pretty cool. Kinda deep with lots of bass. Not obnoxious, but it will still turn some heads. The LM1 and LM2 both flow well, so I wouldn't concern yourself about it robbing you of any performance. The sound is the most important thing to consider IMO.
Last edited by JohnnyC; May 17, 2007 at 08:21 PM.
You wont have any restriction to worry about. The LM2 muffler flows jst fine. I would be surprised to see any real difference on a dyno between the LM2 bullet and the LM1 hollow resonator. A bullet is one of the most free flowing muffler designs available.
Thanks JohnnyC. I know I hadn't heard anyone complain about the LM2 robbing any power but I just wanted to make sure.
What you described(deep with lots of bass, not obnoxious but still turn some heads) is exactly what I'm going for....can't wait to get it on
thanks also SecretFormula
What you described(deep with lots of bass, not obnoxious but still turn some heads) is exactly what I'm going for....can't wait to get it on
thanks also SecretFormula
TECH Fanatic
Joined: May 2005
Posts: 1,135
Likes: 1
From: The 'Burgh, PA
Originally Posted by Adrenaline_SS
Thanks JohnnyC. I know I hadn't heard anyone complain about the LM2 robbing any power but I just wanted to make sure.
What you described(deep with lots of bass, not obnoxious but still turn some heads) is exactly what I'm going for....can't wait to get it on
What you described(deep with lots of bass, not obnoxious but still turn some heads) is exactly what I'm going for....can't wait to get it on
I have it on my dd and with no cats. I get nothing but compliments. If you plan on getting a cam and headers the sounds it simply sex. I love it. Most people will scare you cause the name "Loudmouth" seems to be taboo around here but it sounds really good.
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Originally Posted by JBM
I would never use a 2 1/2" or a 3" y pipe, and bottle neck it into a single straight through muffler with an internal diameter smaller than 2 1/2". Lousy design.
It has to hurt power, less than 2.5" inside is crap..
.Now some of the guys posting are running 2 of them with true duals, that's cool... but just one is not cool...
Tech Resident
Joined: Jan 2006
Posts: 5,117
Likes: 3
From: Philly
you're not going to notice a difference on a stock car. it's nothing at all to worry about. i wouldn't be concerned about the LM2 muffler unless i was running big cubes - and at that point, a y-pipe setup would be stupid.