Sedan Nameless Muffler Install - 5th Gen Subaru Impreza Forum
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post #1 of 24 (permalink) Old 03-08-2019, 05:37 PM Thread Starter
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Sedan Nameless Muffler Install

Got around to installing my 5" Nameless exhaust this weekend. I think it looks so much better than the stock muffler! It also is a lot smaller and lighter than what came on it from the factory. What do you guys think?
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post #2 of 24 (permalink) Old 03-08-2019, 09:01 PM
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Cool without a doubt. I almost never see 4 doors around Chicago, they are very Rare around here.
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post #3 of 24 (permalink) Old 03-09-2019, 12:14 AM
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I bought the same one a week ago, and it’s a lot louder than I imagined. Then I bought the k&n air filter, and it cut almost half the sound out over when I had the factory air filter. I guess it really wasn’t breathing when I had the stock air filter on....
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post #4 of 24 (permalink) Old 03-09-2019, 03:35 AM
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Adding an air filter quiets down the engine?
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post #5 of 24 (permalink) Old 03-09-2019, 08:04 AM
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Thatís physically impossible.


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post #6 of 24 (permalink) Old 03-11-2019, 11:14 AM Thread Starter
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It being louder than I expected was my initial impression too. I think I am finally getting used to it, though it does tend to get pretty low and bass intensive in the 1700-1900rpm range with a steady throttle. I usually try to keep it out of that range while cruising which isn't too hard to do, unless you live in a hilly area.



Rob, did the K&N drop in filter really reduce the noise? In all my experience aftermarket air filters/intakes have made the engine and muffler noise significantly louder.

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post #7 of 24 (permalink) Old 03-14-2019, 12:25 AM
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Yeah, the air filter really did reduce the noise when at the low rpm range. You can tell a difference. Sounds better if you ask me. I’m also going to buy a Crawford Eco block. It increases horsepower and fuel economy. I’m just doing it for the fuel economy. And the link below is the one made specifically for our car if you’re interested.... https://crawfordperformance.com/coll...ts/ecoblock-q1
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post #8 of 24 (permalink) Old 03-14-2019, 05:54 AM
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The air filter canít affect your exhaust noise. And thatís a gimmick just like a throttle body spacer. If Subaru was able to get more mpg and power by just spacing the maf, donít you think they would have done it?


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post #9 of 24 (permalink) Old 03-20-2019, 10:57 AM
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Our cars aren’t the greatest. If you haven’t noticed, but our cars are the cheapest of the line, so cutting corners always does happen. There’s not even real carbon fiber in my car for example... Here’s a link of how an air filter can affect certain aspects of your car: https://www.yourmechanic.com/article...rty-air-filter

Anyways, the Crawford Performance eco block is a spacer. Less air being detected, means the car is going to run differently. It’s a reputable company too. And if Subaru really wanted to give you more horsepower and efficiency, than a newer engine would’ve been made by now, but it’s been years with pretty much the same setup.I rather trust a company who has years of work behind them than some stranger on the internet. They also work on a lot of other cars too. With dyno testing as proof.
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post #10 of 24 (permalink) Old 03-26-2019, 02:52 PM Thread Starter
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Do they have dyno sheets showing the HP gain for the Eco Block? I'd be curious to see if it really makes a difference other than "felt" gains.

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