Shady 0 Report post Posted September 15, 2010 (edited) Looking at getting a new Coby or Resonator for my E30 318i exhaust system. Am wanting to try quieten it down a bit but I want to keep my a/m eurostyle muffler. The current resonator is old & rusty (you shake it & can hear inside is all crumbled etc). My question is, what would be best - noise wise? Not looking for power (1.8 engine, so no point). Is a Coby or Res' best to help try quieten it? A guy at a muffler shop gave me a quote (not going to indulge in the price) but cant remember if was for Coby or Res' but price included everything - but no gaurantees it would work. Opinions & Suggestions on what to pick? Edited September 15, 2010 by Shady Quote Share this post Link to post Share on other sites
hotwire 352 Report post Posted September 15, 2010 If you want to quieten it - put a fluted resonator on it Quote Share this post Link to post Share on other sites
joshnz 2 Report post Posted September 15, 2010 Not to jack your thread, but I have a couple of cobys avail, I bought to use on my old E30 but never did. Quote Share this post Link to post Share on other sites
Shady 0 Report post Posted September 16, 2010 If you want to quieten it - put a fluted resonator on it Whats the diff between fluted & non-fluted? Not to jack your thread, but I have a couple of cobys avail, I bought to use on my old E30 but never did. How much? Quote Share this post Link to post Share on other sites
hotwire 352 Report post Posted September 16, 2010 Whats the diff between fluted & non-fluted? How much? That second picture is a fluted one Quote Share this post Link to post Share on other sites
westy 614 Report post Posted September 16, 2010 Looking at getting a new Coby or Resonator for my E30 318i exhaust system. Am wanting to try quieten it down a bit but I want to keep my a/m eurostyle muffler. The current resonator is old & rusty (you shake it & can hear inside is all crumbled etc). My question is, what would be best - noise wise? Not looking for power (1.8 engine, so no point). Is a Coby or Res' best to help try quieten it? A guy at a muffler shop gave me a quote (not going to indulge in the price) but cant remember if was for Coby or Res' but price included everything - but no gaurantees it would work. Opinions & Suggestions on what to pick? Coby is a brand name. They make exhaust components. A resonator is an exhaust component. Quote Share this post Link to post Share on other sites
e38king 1 Report post Posted September 16, 2010 (edited) If you are wanting to quieten it down shouldn't you be looking for a muffler rather than a resonator? Edited September 16, 2010 by e38king Quote Share this post Link to post Share on other sites
Shady 0 Report post Posted September 17, 2010 I dont know. Its what the muffler man said. Coby or Resonator? I dont know the difference, thats why I went to a shop. Can you get mufflers that go in the middle of the system? Not changing the tip, as I already stated in OP. Quote Share this post Link to post Share on other sites
hotwire 352 Report post Posted September 17, 2010 Just put the one I recommended if you want it a bit quieter As Tony said - Coby is a BRAND - They make various exhaust components. They are often misinterpretted by Joe Bloggs with their description. A straight through Coby IS a resonator - as is any other brand of the same configuration - being straight through. Resonators also come in the oval shape. They do though, vary in internal structure - some (as most, but not all) Coby versions have a straight inside tube with holes in that tube. A fluted type (as in second picture above) (and Coby also do a version of) has perferated flutes which are directional. When they are placed in the system with the openings facing forwards - they in effect "catch" the gasses as they pass through - creating a quieting effect - over the standard version. Both are still resonators - straight through. Got to ask the question though - why can't your "exhaust man" clarify things for you & guide you to a suitable solution for what you are wanting? Quote Share this post Link to post Share on other sites
