Muffler installation - can they be installed "backwards"? - Chevelle Tech
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2004 General Tech Forum from 2004
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Old May 27th, 04, 3:02 AM
Furious Malibu Furious Malibu is offline
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Half stupid question:

I got a pair of new, in the box, mufflers with my 65. I have had to install them due to a transmission swap, blah, blah, blah...off-set inlet and center outlet. If I reuse the existing exhaust system, they would fit better with the inlet in the center and the outlet off-set.

Can most mufflers be installed backwards?

Not sure on the brand name but need to install them to be street-legal...old mufflers are shot and had to cut up exhaust piping anyways...thanks!
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Old May 27th, 04, 6:14 AM
SSJeff SSJeff is offline
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Most mufflers I've had were marked with an inlet/outlet...but, if the openings are the same size and there are no markings on the muffler, I don't see why you couldn't flip them.

Jeff
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Old May 27th, 04, 11:30 AM
Schurkey Schurkey is offline
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Are they marked "inlet" & "outlet", or "A" & "B"?

If A & B, they'll go either way.

Most "performance" mufflers should NOT be connected backwards.
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Old May 27th, 04, 5:09 PM
SteveW SteveW is offline
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I have to agree with Schurkey, most mufflers should not be installed backwards, you are going to get poor flow. You should see an arrow pointing in and one pointing out, or some kind of markings. [img]graemlins/thumbsup.gif[/img] If not look in the opening and see if the baffles are pointing the right way, the exhaust should be able to flow through freely, not be blocked with obstructions.

Of corse there are exceptions to the rule, the Glass Packs (Cherry Bomb's) I put on my '65 could be installed either way, baffles, or backwards was straight through pipe. [img]graemlins/hurray.gif[/img] yea haw!

Steve
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Old May 28th, 04, 12:51 AM
67chevy2 67chevy2 is offline
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Most of the low priced turbo mufflers can be reversed,but most higher end,like Flomaster or Borla,should not be reversed.If there are no arrows or in/out markers,they should be reversible. Steve
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Chevelle Tech > Team Chevelle > Archives > 2004      Current Topic: Muffler installation - can they be installed "backwards"?
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