SleeperZ Posted April 7, 2003 Share Posted April 7, 2003 I put in the final piece of my 3" mandrel bent exhaust yesterday, and road tested it. I bought all the pieces and clamped it all together, except for one piece I had a friend weld up for me. The system consists of the stainless Scottie downpipe clamped to a 2-1/2" -> 3" transition cone, 3" pipe with a jog in it to 2 90* mandrel bent pieces, muffled with a Dynomax Ultraflow. I was very surprised at how quiet this sytem is!! It is quieter than my 2-1/2" system with a 2-1/2" Flowtech Afterburner muffler. There is zero droning at 2500 rpm now -- the old one was horrible. And of course there is slightly less throttle response off-boost, but the boost comes up very fast Quote Link to comment Share on other sites More sharing options...
jgkurz Posted April 7, 2003 Share Posted April 7, 2003 I have the same exact 3 inch mandrel system including the Scottie downpipe and a 3 inch welded DynoMax 17221 "straight through" turbo muffler. I could not believe how quiet the system was under normal driving conditions. The exhaust shop that did the welding was amazed. Droning has not been an issue. I think the turbocharger has a lot to do with reducing the noise level. That all changes when I am accelerating hard under boost. I've yet to get on the dyno, but I think the system will support my desired 340RWHP. Here's where I got my parts, Muffler: http://store.summitracing.com/partdetail.asp?part=WLK%2D17221 Flanges: http://www.jcwhitney.com/item.jhtml?ITEMID=2157&BQ=jcw2 Mandrel bends: http://www.jcwhitney.com/item.jhtml?ITEMID=4055&BQ=jcw2 Reducer: http://store.summitracing.com/partdetail.asp?part=FLO%2DR3025 Quote Link to comment Share on other sites More sharing options...
BRAD D Posted April 7, 2003 Share Posted April 7, 2003 I have the same system on my 240Z, before I had my RB with the stock L24, and was it ever loud. the twin turbos should keep it down Quote Link to comment Share on other sites More sharing options...
flibuoy Posted April 8, 2003 Share Posted April 8, 2003 sure wish you had responded to my questions on flowtechs Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted April 8, 2003 Author Share Posted April 8, 2003 Sorry, I didn't see your post. I suppose it doesn't matter since you already had the Flowtechs.... I wouldn't say it's an intolerable muffler, I'm just very impressed with the Dynomax. The Dynomax also happens to cost $20 more. Quote Link to comment Share on other sites More sharing options...
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