what muffler should i put on my car 74 cutlass?

Question

What would be better glasspacks or flowmaster mufflers? and could i put a x pipe with dumps with the glasspacks or will affect the sound of it? and is there a major difference in performance?

Answer 1

Flo-Masters always work nicely on older cars and they are not as obnoxiously loud as cherry bomb glass-packs types of options.

Also they are fairly inexpensive.

If you have a V8 (I am assuming you do) You should be really happy with a duel 2 chamber flo-master set up.

They are said to increase HorsePower something like 25 HP but that is magazine HP as my friends call it.....Unless you do headers too then I wouldn't expect over 10 HP increase unless you had a real bad issue creating the need for replacing the mufflers.

They Should Cost you about $125.95 - $125.95 if they make that kind that can fit with your cars specs.
Just incase you can't find a part from flowmaster that will accomidate your car (you should) then try a full on summit duel exhaust set up from the hedder back:

I researched the details below:
SUM-680101 Summit Header-Back Dual Exhaust Systems
Exhaust System, Header-Back, Dual, 2.50 in., Aluminized Steel, Buick/ Chevy/ Oldsmobile/ Pontiac, Kit
Today $174.95

I prefer the Flomasters but either it sounds like will be an upgrade. I used a Duel Flo-Master Set up on my 1970 Challenger R/T as an improvement over the stock mufflers and resonators and they sounded awesome! Still do to this day!

Good Luck & I Hope that was helpful....have fun with it & enjoy your classic old school bud.

God Bless!

Dave C. Livermore, Ca

Answer 2

Glass packs make a lot of noise, kill exhaust flow/HP and are real popular because they are cheap and make that “Blat” sound. Flow masters make a lot of noise, Flow really good, and are really expensive. But lets face it, any Turbo Muffler will do what you need on that car. I had a 70 442 with a Very well built 455. After upgrading from the Mr. gasket Turbo muffler to the Flow master mufflers, I did not see any difference on my drag slips; I did however get more than a few tickets for making to much noise. And one more thing, it does not get any better than having a mad/loud wife, solid motor mounts, stop and go traffic in rush hour, and Flow Master Mufflers. (but a toothache may help)
Crossover pipes X pipes and the difference:
H pipes help, unless you have done some real work to the Engine like buying a Mendelo performance intake so you can put the big block heads on that 350, Or take the diesel block bore it .175 over and stick a 425 crank in for 478cid, I would not worry about it. Olds Motors are torque monsters, not High revving air breathing HP kings. Getting that 2ton car to stop and go around corners is a far bigger concern than a tinny bit of backpressure in the exhaust. I would take my x pipe money and spend it on a rear sway bar.

Answer 3

Hi!

I would say Flowmaster Mufflers, however (if you have an open mind), I would go with Magnaflow mufflers. This is because they are made of stainless steel and not aluminized steel like the flowmasters. And they also have a deeper sound (because of this).

And x pipe always helps, and it will change the sound a little. It usually makes the pitch get a little higher.

Feel free to ask me anything else if you have any other questions!

Tito @ TR-Performance
www.tr-performance.com

Answer 4

Watch out the rest of the car will want attention too! Flow master is the way to go. Glas-paks burn out to fast. Replace everything from those new COOK's headers back to the tail pipe.