TWE headers and stromung high flow cat, what else?

[Chi_San]

Going to redo my ehxaust, going to upgrade to the TWE superstock headers and a Stromung high flow cat. I'd like to get rid of the lifeboat muffler my Legacy has stock (it's like 4 feet long and 2 feet across, cut the top off and you could float to Japan in it). I, however, want the exhaust to be quieter than stock.

Should I get a specific muffler, or would it just be easier to get two mufflers and daisy chain them? I'm really aiming for quiet here, my intake is loud enough.

Edit: I'd like to do a block back exhaust, plus I think I've got a plugged cat, which is why I really want to replace the cat. =\ I do have more than 50k miles on the car, so replacing the cat is legal, correct? (I don't live in Cali either).

* Registered users of the site do not see these ads.

[anonymous_wolf]

I have brullen header/hi-flow cat, apexi N1 mid pipe and WRX axle back.

the car is so quiet all i can hear is my intake, my noisy kumho MX tire, and all the rattling sound in my car~!

[John2.5RS]

If you put a resinator in the system you shouldn't have to put 2 mufflers on it, That's kind overkill and heavy, IMO. The Greedy evo 2 is pretty quite during cruising. You could do so sound insulation/deadining to eliminate some road noise.

[shoeler25]

I wouldnt recommend the Apexi N1 for a quiet muffler. Im not sure quieter than stock is gonna be happening with headers and hi flow cat. My borla headers/catback arent too bad while cruising, more than stock for sure, but I dont know that its attracting all that much unwanted attention. Im gonna go out on a limb and say that no set up with a header will be quieter than stock during a spirit acceleration. I agree tho that 2 mufflers will be heavy and over kill, have a resonantor put in along with a fairly large muffler and you should be closer to where you want to be.

[Chi_San]

Originally Posted by John2.5RS

If you put a resinator in the system you shouldn't have to put 2 mufflers on it, That's kind overkill and heavy, IMO. The Greedy evo 2 is pretty quite during cruising. You could do so sound insulation/deadining to eliminate some road noise.

My stock exhaust is a little rumbly, although I think I have a leak somewhere. Sounds like a WRX until I get above 4,500 rpm. It's not a gasket in the manifold like last time, there is no popping when I let off the gas now.

right now, I'm actually a little more concerned with the axle forward. Other than the $950 TWE header and the Borla header, is there anything else available? I'm looking for performance, not sound, which is why I perfer the TWE over the Borla. Specifically, I'm looking for low end torque. I have a 5MT, but I still drive in fourth gear at 30 mph or above, and 5th gear above 40. I obviousy downshift to accelerate, and I don't lug the engine. Last thing with headers, I cannot stand the ****ing heat shield on my Legacy, it rattles and buzzes, hums, and DRIVES ME NUTS! Whatever header I get cannot have a heat shield, I want coated.

Second, TWE makes a high flow cat, as does Stromung. Would the TWE perform better, and are there any other options? I'm looking for performance here. Plus, I'd rather just have 1 cat instead of 2.5. Having 3 different canisters under the car is just excessive, IMO, one should be more than enough. =\ Then again, I live in Oregon, not Cali...

I'm DEFINATLY going to have a resonator. As far as I understand it, the stock one doesn't hinder performance, or increase it, so I'm going to leave that alone. I also don't want my car to sound like it backfires every time I let off the gas (I had an exhaust leak in my manifold after Subaru replaced some syncros in my tranny under warrenty).

Hmm, maybe I could just weld a high flow cat to the merge collector on the manifold, then weld a straight through muffler to the cat, then some exhaust pipe to the back of that?

Once I get everything and am going to do the install, I'll run the car with just the stock header on it and nothing else. I'll post video.