Re: 429 scj Exhaust System

Original 351-429 front pipes were 2 1/4"...tails were 2".

The M/U replacement pipes I posted about are all 2 1/4" front and tails....that's why you would need their D1ZZ 2-1/4" mufflers. The mufflers are the correct length.

If someone needs everything..they should just buy one of the whole M/U kits. M/U has 4 different kits for 71-73 351+, depending on which mufflers you want, and whether you want to use chrome tips or not.

I think the better muffers would be the stock looking "turbo" D1ZZ's I showed, as the Flowmasters don't have the welded on brackets.

If i didn't have a big 2.5" performance stainless steel system for my car now, i'd probably go with the M/U system if I wanted something close to stock, but with a bit more performance?

IMO..Bob Wilson's system that Chris mentioned on his 429 Cougar is very very nice, but too stock for me...and i have heard Bob's system is too quiet. But if I wanted 100%+ stock and welded, i'd go with Bob's Boss 351 system....with your own 429 h-pipe....again, IMO.

(I don't know if Chris used the Boss 351 system as is, as 71-73 Cougars had slightly longer tailpipes than 71-73 Mustangs. Still should all work fine though on a Cat.)