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383 exhaust manifolds #943869 03/06/11 01:44 AM 03/06/11 01:44 AM
Joined: May 2010 Posts: 31 Rhode Island B browndevil OP member
browndevil OP member B Joined: May 2010 Posts: 31 Rhode Island	I want to put a new exhaust system on my 70 Challenger 383 with auto transmission. I want to get a set of manifolds taht are correct for a challenger. It currently has casting number 2843992/2806900 which are not correct. From what I have been able to gather, it should have 2951865/2899879 but these seem to be harder to find and more expensive. I appears that 3751068/3751071 will also work and these are easier to find and cheaper. I don't require date/numbers matching. What is the physical difference between the two sets? Is it a difference in clocking of the mounting bolts? Any help would be appreciated. Thanks, Michael Last edited by browndevil; 03/06/11 02:01 AM.

Re: 383 exhaust manifolds [Re: browndevil] #943870 03/06/11 03:01 AM 03/06/11 03:01 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	might find some good info at www.bigblockdart.com live every 24 hour block of time like it's your last day on earth

Re: 383 exhaust manifolds [Re: browndevil] #943871 03/06/11 12:19 PM 03/06/11 12:19 PM
Joined: Jan 2003 Posts: 74,978 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,978 U.S.S.A.	Quote: I want to put a new exhaust system on my 70 Challenger 383 with auto transmission. I want to get a set of manifolds taht are correct for a challenger. It currently has casting number 2843992/2806900 which are not correct. From what I have been able to gather, it should have 2951865/2899879 but these seem to be harder to find and more expensive. I appears that 3751068/3751071 will also work and these are easier to find and cheaper. I don't require date/numbers matching. What is the physical difference between the two sets? Is it a difference in clocking of the mounting bolts? Any help would be appreciated. Thanks, Michael If you don't require dates/numbers, and you don't want to have the heat stove, the manifolds you have are the same as either of those other sets you quote , the only difference is the clocking of the flange on the passenger side manifold. But to answer the other question , no difference in mounting or flange clocking of the other 2 sets . Cost ... ZERO ....

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