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Discussion Starter · #1 ·
A friend of mine just had an exhaust system installed on his Pontiac GP, the shop put his flowmasters on backwards will this affect performance? it sure seems quieter than I would have expected.
 

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A friend of mine just had an exhaust system installed on his Pontiac GP, the shop put his flowmasters on backwards will this affect performance? it sure seems quieter than I would have expected.
Sure does matter. Which flowmasters are they.
 

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I think i would go back to that shop for a correction.
 

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Discussion Starter · #6 ·
942551 deltaflow 50 series 2.50 in and out
 

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Discussion Starter · #8 ·
I'll send him back to the exhaust shop armed with this information, thanks to all.
 

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I think most are designed with one flow direction in mind. They have a lot of internal baffling which can really cut down the flow-through.
 
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