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 Q Muffler 
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Post Q Muffler
How many HP is the Q muffler suppose to add to a 37EFI ?


Tue Aug 15, 2017 7:29 pm
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Post Re: Q Muffler
I think it depends on what else is done to the motor.

Negligible on its own.


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Wed Aug 16, 2017 6:13 am
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Post Re: Q Muffler
But to answer your question...12


Wed Aug 16, 2017 10:41 am
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Post Q Muffler
The Q makes 1.5 HP more than the stock exhaust on a stock engine.

The BPS Rapid is a 4 HP gain over stock on a stock engine.

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Wed Aug 16, 2017 1:03 pm
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Post Re: Q Muffler
I Havent had any experience with the new Q muffler, but I tell you what the noise reduction for a hunt motor that have cam/ heads, the Q is hard to beat.
IIRC from looking it has larger pipe baffles, larger holes, and a larger outlet than stock. Its the same basic principal but refined more to get more flow.

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Wed Aug 16, 2017 1:13 pm
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Thu Aug 17, 2017 12:12 pm
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Post Re: Q Muffler
I've already got numbers from a stocker and a gutted sticker with a 2.5" outlet, and will be putting a Q on my engine within a month.

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Thu Aug 17, 2017 12:39 pm
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Post Re: Q Muffler

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Fri Aug 18, 2017 6:20 am
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Post Re: Q Muffler


Fri Aug 18, 2017 6:34 pm
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Post Re: Q Muffler
Just for clarity, I have decibel numbers from my sound meter and will post them once I get the Q. Not dyno numbers. My boat does what it does, only ever concerned about the 3, 4, and 5 man hunt load ability to plane and run well. Not paying for a sheet of paper and bragging rights.

Yes Marcus, it is very loud. 95 decibels at idle. The stock on my engine doesn't hit that at 4k rpms.

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Fri Aug 18, 2017 7:50 pm
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Post Re: Q Muffler
I'm looking for quiet. Just as long as it doesn't kill performance.


Sat Aug 19, 2017 6:17 pm
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Sat Aug 19, 2017 9:16 pm
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Post Re: Q Muffler
Seat of the pants feel... At WOT the Q and gutted stock are about the same on top.... Now on the bottom end of the RPM band the gutted stock will rev quicker due to less restriction. There is always a tradeoff.

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Mon Aug 21, 2017 5:37 am
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Post Re: Q Muffler
How have the ones with the new flex fittings been holding up? I'm gonna need something for my duals that I'm building, and I like quiet.


Wed Aug 23, 2017 9:46 am
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Tue Aug 29, 2017 11:16 am
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Post Re: Q Muffler
Talked to BPS they said 2.5 hp on stock motor and another .5 with K&N filter so the 37 is basically a 40.


Sun Apr 19, 2020 8:07 pm
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Post Q Muffler


Sun Apr 19, 2020 8:40 pm
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Post Re: Q Muffler
Not like anybody is going to notice big differences with 2.5 HP gain on these things. But, I feel I had improvements from stock to the Q....lemme rephrase...I know I had improvements.


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Sat May 16, 2020 8:00 am
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