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Hey, so, I originally put a Yonaka exhaust on my EG hatch and was really happy with how it sounded out of the gate with the stock d15 and 4-2-1 crap evay headers that were on the car when I bought it. I added an ASR brace and away bar about 24 hours later and the muffler that came with it was a no go for fitment wise. After beating down the corner down far enough to fit with a sledge hammer and making it fit, I had a muffler shop swap it with a Borla ProXS 14" long oval muffler. It was a bit louder but still tolerable.
Fast forward, flip the engine to a k20z3 + DC2.2 cams + 4-1 headers and you can see where this is going. Just too darn loud.
I see lots and lots of info very clearly supporting 3" exhaust on the k-series platform, and have had enough 3" exhausts on cars to be well aware that they're not quieter than 2.5" exhausts, but generally not louder by a ton. I want my cake and want to eat it too, though, so I'm kinda hoping I can do a kteller 3" pipe setup with a resonator and chambered muffler (turbo style or otherwise) and end up with as good or better flow than I've got now with less sound.
I've searched and searched and not found a ton on the topic, though, nothing semi recent or super possible at least. I know having restrictions like a muffler further down is definitely less of a performance drag than smaller pipe, so it seems like it should work reasonably well. Is anyone actually running such a thing though? I'm obviously not looking for anything near stock sound levels, but if I could get a sound level close to the d15 with headers, a resonator where the cat goes, and a Yonaka or WS2 exhaust fitted which is made of stainless steel and flows as well or better that'd be outstanding.
I know exhausts are highly subjective, and what's quiet to one person may be really loud to another, so hopefully the note on the Yonaka setup (which is well known to be among the quieter EG hatch options) helps.
What I've found so far is:
Dynomax VT - were pretty quiet at first but all fail in a year or so, also they're not made any more.
Magnaflow Chambered mufflers (unknown model and specs) - are pretty tame and sound nice.
ES oval - sound great, good and quiet, but are out of production
Anything with switchable valves... - sorry, not interested. I'd rather just lose a couple/few hp always.
Anyone got any specific models that work well, are in production, are made of stainless steel, and don't have major flaws? I'd love to hear what you've got and how you like it.
--Matt
Fast forward, flip the engine to a k20z3 + DC2.2 cams + 4-1 headers and you can see where this is going. Just too darn loud.
I see lots and lots of info very clearly supporting 3" exhaust on the k-series platform, and have had enough 3" exhausts on cars to be well aware that they're not quieter than 2.5" exhausts, but generally not louder by a ton. I want my cake and want to eat it too, though, so I'm kinda hoping I can do a kteller 3" pipe setup with a resonator and chambered muffler (turbo style or otherwise) and end up with as good or better flow than I've got now with less sound.
I've searched and searched and not found a ton on the topic, though, nothing semi recent or super possible at least. I know having restrictions like a muffler further down is definitely less of a performance drag than smaller pipe, so it seems like it should work reasonably well. Is anyone actually running such a thing though? I'm obviously not looking for anything near stock sound levels, but if I could get a sound level close to the d15 with headers, a resonator where the cat goes, and a Yonaka or WS2 exhaust fitted which is made of stainless steel and flows as well or better that'd be outstanding.
I know exhausts are highly subjective, and what's quiet to one person may be really loud to another, so hopefully the note on the Yonaka setup (which is well known to be among the quieter EG hatch options) helps.
What I've found so far is:
Dynomax VT - were pretty quiet at first but all fail in a year or so, also they're not made any more.
Magnaflow Chambered mufflers (unknown model and specs) - are pretty tame and sound nice.
ES oval - sound great, good and quiet, but are out of production
Anything with switchable valves... - sorry, not interested. I'd rather just lose a couple/few hp always.
Anyone got any specific models that work well, are in production, are made of stainless steel, and don't have major flaws? I'd love to hear what you've got and how you like it.
--Matt
