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11-03-2011, 08:26 AM | #45 |
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Add 100 bucks or whatever it costs to siamese the crossover more completely and I think it'd be a good value. As it sits now it looks worse than the OEM unit with the primary cats removed.
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11-03-2011, 10:27 AM | #46 | |
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http://www.europeanautosource.com/pr...catless-e9x-m3 Look at image 3 of 8. http://www.ebay.com/itm/BMW-E92-E93-...172#vi-content Look at image 8 of 9. |
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11-03-2011, 11:03 AM | #47 | |
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Unfortunately, the hard part is helping people understand that a U.S. made unit, the cost of the high grade stainless steel would cost far more than 400 dollars alone, and this does not reflect the manufacturing costs or any other costs associated with the unit. There are many members on this forum that can attest to having the cheaper quality x-pipes and what has happened to them after some decent amount of use.
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11-03-2011, 11:30 AM | #48 | |
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11-03-2011, 11:32 AM | #49 | |
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11-03-2011, 11:45 AM | #50 | |
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11-03-2011, 12:00 PM | #51 | |
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While I do agree that things could be cheaper, but unfortunately, this isn't really possible if the unit is manufactured here in the U.S. Sure it is possible to send it oversees, but then the company would be opening the doors to a whole lot of other issues such as fitments, quality control, consistency, product being knocked off easily, no control over the quality of materials used. I understand when people say Akrapovic is expensive, but it is also made of Ti.
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11-03-2011, 12:12 PM | #52 | |
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" Brand New TOP SPEED PRO-1 2.5" O.D. T304 Stainless Steel 1.8mm Thickness Material Exhaust Middle H-Pipe X-Pipe *** Mandrel Bend Piping + TIG Welding " I guess it might worth a while to try it out. Since from everything I know, this has the same spec with some of the brands that sold on the forums for thousands.. Again Akrapovic is a different story as the purpose is not only about performance gain but also about weight saving and style.
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11-03-2011, 12:19 PM | #53 | |
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None of their products have even been entirely TIG, only the small portions have been TIG welded (such as 02 bungs, exhaust tips). The piping has for the most part been MIG welded. In most cases too, the steel had magnetic properties, something SS304 should not have. Sometimes, SS304 can become magnetized around the mandrel bend, but its always best to check the straight sections and thats when it became obvious what they were using. On the E46 cars that would purchase the rear section mufflers, the customer had to go back to a fab shop and have the unit corrected because it did not fit and the tips were very crooked.
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11-03-2011, 01:14 PM | #54 | |
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11-03-2011, 02:08 PM | #55 |
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Holy rasp batman. No resonators should be loud but also crazy raspy!
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11-03-2011, 02:30 PM | #56 |
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Challenge and others sell no resonator midpipes, for twice as much or more.
Plenty of people have used Top Speed replica midpipes and exhausts with no problems. If I was a competitor selling cheap chinese parts like some of the other "name brand" exhaust sellers, I would be worried and doing whatever I could to put down the Top Speed part. Some of the competitors do make very nice parts. I like the Borla quad resonator midpipe. I would have no qualms about Borla's quality control. But if a no-name part comes out with dual resonators for half the price, I would be tempted. I have had two no-name exhausts before, a set of headers and a rear exhaust, and neither gave me any issues. |
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11-03-2011, 04:30 PM | #57 |
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The insanity is the price people are paying, check the link below for reasonable prices for materials.
http://www.spdexhaust.com/pdfs/2011_Price_Guide.pdf |
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11-03-2011, 06:24 PM | #58 |
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OH GOD its a 400$ full xpipe not a big deal LOL
This shit is funny im glad for those who spend crazy amount on xpipe ... But shit OEM gutted xpipe will have the same outcome as the aftermaket...
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11-03-2011, 07:12 PM | #59 |
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This is highly incorrect and provable Sean.
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11-03-2011, 08:11 PM | #60 | |
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http://www.fastintentions.com/index....0c86b0403b89bd |
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11-03-2011, 08:21 PM | #61 | |
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I personally think the best XPipe on the market right now is the MRF Engineering XPipe. Amongst all the XPipes, they seem to be one of the few that implements a true XPipe and at a theoretically ideal location of a V8. Hopefully we get to see more reviews and dynos of their products in the near future. Although, I am still rather curious to hear Sean05's impressions of the TopSpeed XPipe. Hopefully he doesn't run into any problems, especially in the long run.
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11-03-2011, 08:38 PM | #62 |
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So let me ask you this. How much of a difference would there be between a OEM x-pipe which has primary cats swapped out for test pipes? And say another 'quality' x pipe? Performance wise that is...
Because honestly I want to to do that..keeping the secondary cats and resonators as to lessen sound and smell.. but at the same time gaining power. |
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11-04-2011, 11:34 AM | #63 | |
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The factory unit is not a true x-pipe by any means. I have cut the factory x-pipe apart to see what BMW did inside of their so called "X" and it is a joke. The internal merge is roughly 1.1" in diameter. The secondary cats to help the smell a little bit. Power wise as a test, I have run a full catless modified OEM unit, and the gains were very marginal at its best. Power delivery was erratic because exhaust design requires engineering and tuning to compliment the powerplant. Deleting cats does free up some power, but that is not where all the power lies.
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11-04-2011, 11:43 AM | #64 |
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It looks like Vishnu gained 13 rwhp and 28 lbs rwtq from welding straight pipes in place of the cats on a stock midpipe, with no tune.
http://www.m3post.com/forums/showthread.php?t=585325 I am sure there are some dynos around of "name brand" catless midpipes, with no tune. I would think that nice mandrel bending and maybe a better X section would be worth a few rhwp, though I am not sure how perfect the X needs to be in order to have the desired balancing and/or scavenging effect. |
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11-04-2011, 01:51 PM | #65 | |
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11-04-2011, 02:33 PM | #66 |
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If you don't want to change the software to accomodate catless running, then you should stick with a pipe that eliminates just one set of cats or that substitutes high flow cats for the one set that remains. No CEL, emissions passability, substantial power gains, and closer to the ability of the stock ECU to adapt to take advantage of the improved flow. You can find dynos for these kinds of x pipes with some searching. Fabspeed makes one, Sosi makes one, Turner sells cat delete pipes for the stock exhaust, AA and Challenge and Akrapovic and others sell complete pipes with high flow cats, etc.
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