FFR mufflers

[murjam]

Could any of you gentlemen who have replaced the FFR mufflers on the 33 hot rod tell me what make and model you switched to . The FFR's are awful loud and bark a lot, I still want the deep hot rod sound without the barking. Thanks

[cob427sc]

I love the bark. Sounds like a pitbull on the prowl.

[progmgr1]

If you want to stick with the stock location, I saved several recommendations from earlier builders:

Magnaflow 11255 (11365 alt., but 2” shorter) or Flowmaster 842442 mufflers (nice rumbly sound)(Super HP 2?) fit the '33, or SLP Performance 31065 2 ¼” inlet & outlet 4”h x 9.75”w x 13”L, but check inlet/outlet sizes & offset or 14362 or maybe 14325. Walker 41956 extensions fit if need to fill gaps. Another recommended the Flowmaster 40-series delta flow product line. Another one to check is: Dynomax VT p/n 17155 Others have said that either Borla or Magnaflow are both good.

Use this data as a starting point (5-7 years old so maybe obsolete?). You just need the right physical size, pipe size and offsets.

HTH Keith HR #894

[murjam]

If you want to stick with the stock location, I saved several recommendations from earlier builders:

Magnaflow 11255 (11365 alt., but 2” shorter) or Flowmaster 842442 mufflers (nice rumbly sound)(Super HP 2?) fit the '33, or SLP Performance 31065 2 ¼” inlet & outlet 4”h x 9.75”w x 13”L, but check inlet/outlet sizes & offset or 14362 or maybe 14325. Walker 41956 extensions fit if need to fill gaps. Another recommended the Flowmaster 40-series delta flow product line. Another one to check is: Dynomax VT p/n 17155 Others have said that either Borla or Magnaflow are both good.

Use this data as a starting point (5-7 years old so maybe obsolete?). You just need the right physical size, pipe size and offsets.

HTH Keith HR #894

Thanks for the info, good place to start. What mufflers are you using

[progmgr1]

I went completely off the reservation and adapted a muffler from a Cadillac CTS-V behind the IRS. Not an option for most builders...
Keith HR #894
20190607_165019.jpg

[murjam]

just ordered Flowmaster Super 44's will let youknow how they sound

[Brastic]

Compared to my Cobra, the Hot Rod is much more quite. Well, except for the down shifting back fires.

[RoadRacer]

just ordered Flowmaster Super 44's will let youknow how they sound

Please do.. I’m approaching 1000 miles and mine sound almost tinny.. very odd

[Kamp]

Have you installed the Flowmasters?

[murjam]

Could not get the Flowmaster mufflers, bought them on amazon but they could not deliver them. Bought Magnaflow # 11225, just installed them and they are quieter at idle but still give you the great sound when you step on it. Were not easy to install, the inside dia. of the muffler stub was 2- 5/16 " and our exhaust pipes are 2- 1/4". The muffler stubs are heavy gauge and I could not crimp them tight using the supplied muffler clamps. Bought 2-1/4 od. x 2-1/4 ID reducers and welded them on the muffler stubs them inserted the exhaust pipe in the reducer and crimped it with a heavy duty 3/8" clamp . The easier way would be to insert the exhaust into the mufflers and weld them. Could not get a welder to do the job, all said it was to small a space to work in. If you use my method