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Old 11-07-2020, 12:50 PM
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sjdiesel sjdiesel is offline
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Join Date: Jun 2013
Location: Thousand Oaks, CA
Posts: 183
Default 2.5” muffler question

Asking here because the exhaust section doesn’t get a lot of traffic.

Can you take a pair of 2.5” dynomax ultra flows (17222) mufflers and open them up to fit 3” exhaust? I was looking at these mufflers in person and it appears that they have 3” (or very close to 3”) internals. Wondering if anyone has done this or knows if the internal baffling is the same diameter between the 2.5” & 3” mufflers.

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Sean
1967 GTO
Koerner built 468 with Edelbrock RP’s 315cfm by Butler, Luanti Voodoo HR 20510713, 4l80e, Holley Terminator EFI