OEM Muffler Dimensions

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69XR7RestoMod
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Posts: 125
Joined: 21 Nov 2011, 21:41
Location: North Florida

OEM Muffler Dimensions

Post by 69XR7RestoMod » 25 Feb 2018, 15:18

Does anyone have the exact dimentions of the mufflers for a 69 M Code?

Trying to figure out if a Dynomax Turbo Flow 17748 will fit - they are 4.24 H x 9.75 W x 20” L Body, 25.5” total length.

Currently running 17733 which are 14” or 18.5” total and are a bit too loud.

Being almost 50% longer, I would expect the 17748 to be about right
1969 XR-7 Restomod 408ci 483HP/523TQ, FiTech, TKO-600

J_Speegle
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Re: OEM Muffler Dimensions

Post by J_Speegle » 25 Feb 2018, 15:23

Your application would have had a single transverse muffler mounted between the rearend and the gas tank. Not individual ones like on later year Cougars

Would guess your request should be for 70 mufflers

If I'm reading the factor charts correctly

Long 19" (does not include inlet and outlet length) Overall 38"
Tall 4"
Wide 10 1/2"
Inlet 2 1/8"
Outlet 2 1/4"

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70b302cat
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Re: OEM Muffler Dimensions

Post by 70b302cat » 25 Feb 2018, 18:02

J_Speegle wrote:
25 Feb 2018, 15:23
Your application would have had a single transverse muffler mounted between the rearend and the gas tank. Not individual ones like on later year Cougars

Would guess your request should be for 70 mufflers

If I'm reading the factor charts correctly

Long 19" (does not include inlet and outlet length) Overall 38"
Tall 4"
Wide 10 1/2"
Inlet 2 1/8"
Outlet 2 1/4"
Jeff,

I have to disagree with you. The only year that a classic Cougar had a transverse muffler was 1967 according to my MEL mpc. Below is the 1969 351 dual exhaust page, it does show as service replacements in the upper section the 1970 Mustang mufflers (D0ZZ), but the lower section of the page shows the factory original parts (C9WY). The 1970 page uses 1970 Cougar mufflers (D0WY).
Attachments
69 m exh.jpg
69 m exh.jpg (92.85 KiB) Viewed 141 times
Dave

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70 Convertible 351C 4V Close ratio
70 Cyclone Spoiler 429 SCJ 4 speed Drag Pak
70 Eliminator B302 4V Close ratio
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70 Eliminator 428 SCJ 4 speed Drag Pak
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J_Speegle
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Posts: 284
Joined: 10 Dec 2011, 19:15

Re: OEM Muffler Dimensions

Post by J_Speegle » 25 Feb 2018, 22:37

Sorry reverted back to Mustang ::) thanks for the correction

69XR7RestoMod
Registered Member
Posts: 125
Joined: 21 Nov 2011, 21:41
Location: North Florida

Re: OEM Muffler Dimensions

Post by 69XR7RestoMod » 26 Feb 2018, 04:41

Thanks for the info, looks like the muffler I'm planning on will just fit.
1969 XR-7 Restomod 408ci 483HP/523TQ, FiTech, TKO-600

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