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BMW 3-Series (E90 E92) Forum
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Why doesn't Dinan do downpipes?
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05-22-2009, 11:20 PM | #1 |
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Why doesn't Dinan do downpipes?
Why chase after, what, 5 hp with a better designed CAI, when there is so much more to be gained with a nice set of catted downpipes?
You don't even have to design them. Just buy a good desin from one of the companies already making them (ala FMIC), make sure they are CARB compliant and what have you, add the warranty slush fund up charge, (a $500 flash upgrade to take full advantage!), profit margin, and Bob's your uncle. Don't make me spend my $ elsewhere, cause I will.
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05-22-2009, 11:34 PM | #2 |
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well isnt the reason the downpipes have cats on them is so bmw can pass DOT emissions - since the closer the cats are to the motor, the cleaner the exhaust fumes are?
if you read ALL the ads for downpipes - all are for OFF ROAD USE - I.E. Illegal on US ROADS.
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05-23-2009, 01:34 AM | #3 |
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There should still be room for catted downpipes that meet minimal standards yet increase flow.
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05-23-2009, 01:46 AM | #4 |
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it's easier to do CAI because those you can install and remove without the use of a jack, and anyone that knows how to use a screw driver can install them. Plus, the CAI is a visual enhancement... "eye candy".. you can't see DPs.. so you can't "show them off"... But, since everyone can see your CAI, Dinan wants to milk people for it.
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05-23-2009, 02:04 AM | #5 | ||
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Quote:
Quote:
Last edited by JoeyFiasco; 05-23-2009 at 03:21 AM.. |
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05-23-2009, 10:09 AM | #6 | ||
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Quote:
Quote:
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05-24-2009, 12:34 AM | #8 |
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correct, that's why dinan doesn't offer full catback neither...
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05-24-2009, 12:35 AM | #9 |
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They should just out "for offroad use only". LOL
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05-24-2009, 12:38 AM | #10 |
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except off-road only don't go together with the dealer warranty because it means illegal on u.s. road hence some legal issues... too much headache for dinan if you ask me. they know there are several other companies who can do WAY CHEAPER than what dinan could've even if they decided to give it a go, and chance's are they are not even going to get R&D cost out of that...
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05-24-2009, 01:52 AM | #13 |
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i would less surprised if they come up with bigger turbo kit than less restrictive CAT conveters... All OEM manufactures including OEM tuners like AMG, M, will not do that. Have you ever heard GO GREEN? it all comes down to emission. They may put more restrictive ones and/or more # of cats but definitely not the opposite way...
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05-24-2009, 10:06 AM | #14 |
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05-24-2009, 10:27 AM | #15 |
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In their software press release for the 335 some of the testing mentioned using an x-pipe exhaust "for racing only". If memory serves, this was a product in their pipeline (along with the CAI). Presumably they could offer catted or catless downpipes on the same basis.
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05-24-2009, 11:46 AM | #17 |
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according to the clean air act, it's all illegal. They just don't enforce it, but they could. This includes parts other than an exhaust, like an ecu that changes the air/fuel ratio. CARB cert. doesn't matter either-still illegal, but odds are they wouldn't prosecute you.
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05-24-2009, 11:55 AM | #18 |
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interesting reading from EPA fact sheet
source:
FACT SHEET: EXHAUST SYSTEM REPAIR GUIDELINES The EPA has prepared this fact sheet to answer some of the most commonly asked questions about the types of exhaust work a repair shop can legally perform. If you need any further information about the EPA's tampering policy, please call (202) 233-9100 or 233-9040. Question 1. Under what conditions or circumstances can a catalytic converter be removed from a vehicle and a converter replacement pipe be installed? Answer 1. Under federal law, catalytic converters may not be removed and replaced with "converter replacement pipes" by any person. The 1990 Clean Air Act Amendments even prohibit private individuals from installing "converter replacement pipes" on their own vehicles. Anyone who installs such pipes would violate section 203(a)(3)(A) and (B) of the Clean Air Act (Act). In addition to federal law, forty-five out of the fifty States also have statutes or regulations which prohibit tampering with the pollution control equipment on motor vehicles or driving or selling such vehicles. Thus, vehicle owners who tamper with their own vehicles may be subject to substantial penalties under both federal and State law. The only circumstances in which a person would be allowed to remove a converter is if the vehicle is being shipped overseas to an area where unleaded gasoline is not generally available. (Vehicles traveling to Canada or Mexico are not eligible for this exemption.) In this instance the vehicle owner must have a letter from the EPA specifically authorizing the converter removal from the vehicle in question. -2- Question 2. Can I remove a converter from a vehicle that is used only for "off-road" driving? Answer 2. No. The tampering prohibition discussed in Answer #1 applies to this situation as well. The federal tampering prohibition pertains to "motor vehicles," which are defined by section 216(2) of the Act as "any self-propelled vehicle[s] designed for transporting persons or property on a street or highway." A light-duty vehicle manufacturer certifies an engine-chassis configuration as meeting the applicable emissions standards for motor vehicles manufactured in a given model year, and it is not legal for anyone to "de-certify" a motor vehicle for "off-road" use. more interesting reading: http://www.off-road.com/trucks4x4/ar....jsp?id=194395 |
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05-24-2009, 12:18 PM | #19 |
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close the thread now !!!
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05-24-2009, 02:35 PM | #20 |
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05-24-2009, 02:47 PM | #21 |
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Wow, a lot of vendors and users on here could be prosecuted for crimes against the environment.
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