what kind of muffler on 2gen brat?

[Bratastick]

Need to get the exhaust reworked. Gonna have them cut out the catalytic converter and run a 2 inch pipe. I'm hoping they can reuse the original Y pipe. What kind of muffler would be good. Don't necessarily want anything really loud, but a little would be ok. I'm guessing the stock mufflers were pretty quiet.

[Subaru Scott]

Most standard mufflers are going to be louder than factory. I had a hard time finding one as quiet as stock without running a resonator too. "Turbo" style mufflers, originally developed by GM for the Corvair turbo, by the way, will give a little rumble.

Edited July 13, 2017 by Subaru Scott

[BEECHBM69]

I've got Magnaflow stainless mufflers with two inch stainless pipe on all three of mine. A little rumble without being obnoxious at speed. 

 

Stainless is a little more expensive, but if you're planning on keeping the car, you'll never have to replace it. 

 

Dan

Edited July 13, 2017 by BEECHBM69

[czny]

You'll wanna keep it high & tight to underside. This round Magnaflow fits very nice..............

 

Don't remember what model muffler but good tone & not very loud.

 

Edit - page 54 of Magnaflow catalog, model 12634 SS 6 inch round by 14 inch case. 2 inch in & out offset

Edited July 13, 2017 by czny

[bratman2]

I have the Magnaflow oval Stainless Steel. Nice rumble form behind or if your WOT. Otherwise relatively quiet. Don't remember the model but it was 2" inlet/outlet and same length as factory.

[carfreak85]

I'm shocked nobody else has said this yet, but:

 

Don't be a jerk and remove your catalytic converter.

 

If all you want is a louder than stock exhaust to do it properly by getting a new, high-flow cat and leave the exhaust without a muffler.  You will gain very little power by keeping any portion of the OEM exhaust anyway.

 

Again, don't be "that guy".

[Bratastick]

I guess I'm that guy that doesn't see the need for a catalytic converter.  

[carfreak85]

Well, if the $10,000 fine from the EPA for tampering with an emissions control device doesn't do it for you, maybe the fact that without a cat you are basically poisoning yourself and everyone else around you will change your tune.

 

But my guess is that you don't really care and the idea of "going cat-less" is a wet dream of yours.  If that's the case, nothing I, the government, nor anything that anybody else will tell you would change your mind.

 

A modern, high-flow cat will provide the same muffling effect as a baffled muffler design with none of the flow restrictions that typically make people delete their cats.

 

If you want an exhaust that ACTUALLY makes more power than stock, here is your recipe:

 

Scrap everything from the exhaust flange rearward.

1 1/4" primaries with a decent merge angle aft of the factory cat location going up to a 2" primary.

A single entry/single exit 2" 300+ cell high-flow cat mounted below the driver.

2" Straight pipe out the rear.

 

If this set up proves too loud or too raspy, you can add a resonator after the cat, or a straight through, perforated core muffler in the stock location.

Edited July 14, 2017 by carfreak85

[Bratastick]

If I were to need to pass emissions, which I'm not required to do, I'm thinking no converter is going to let my Weber conversion pass. It's likely this car will be driven less than 1000 miles annually. 

 

I do think your prescription for a high flow system is spot on.

[charles_thomas]

Well... That escalated quickly.

[BEECHBM69]

Well... That escalated quickly.

 

It always does. The subject seems not to matter. 

 

Dan