I’m getting set to replace my aging exhaust on my ’77 F250. Cherry Bombs or glasspacks are whats on it now and I’m considering 50 series Flowmasters with 2 ½ inch pipe. I’m running a completely rebuilt 400M bored .030 over, RV cam plus a few other upgrades. I want a decent sound but don’t want to scare the neighbors however my main concern is performance with all the investment in the motor. Any thoughts?

 

Sounds like flow masters are what you need. I have trucks with both and I know what you mean by wakeing up the neighbors. Lol.

 

Completely different set-up but I had cherry bombs on my 96 Mustang GT with the 4.6L 2V motor. Cherry bombs were corroded through and I replaced them with Flowmaster 40 series(whole cat-back set-up). Flowmasters were quieter(good thing) but I definitely missed the sound of the cherry bombs. If I could go back I would have went with the more expensive Magnaflows. I prefer the sound and Magnaflows are better quality IMO.

 

I have had both and prefer the sound more from the Flowmasters. both were run with headers and the flowmasters have that nice rumble.

 

I went with the cherry bomb vortex mufflers . Hold up better then the glasspacks and flow better

 

I'd go with the Flowmasters because of their thick casings.

 

if you like the sound of the glasspack but are worried about the volume of the exhaust, just find the longest one you can, also the biggest outside diameter. Many of the long GP's ive heard are actually quite mellow, but still have that classic glasspack sound.

some guys like the flowmaster sound .... to each his own.

I've got both, but for me, nothing better than a short fat glasspack!

 

You might want to consider a 3 inch single flow master. We have used this setup on alot of trucks and it works great and not real loud. We have also used a dual in and dual out and it works very good as well.

 

I love my heartthrob muffler(s). they are quiet at idle, but real rumbly. when you step on the pedal you can hear it in the cab...with the windows up. (now granted i don't have carpet...) what i like MOST about them, is that they don't resonate like flowmaster super 40's do. I hate how loud they (flowmasters) are at idle. i feel it's obnoxiously so, past the point of just being mean sounding. then god forbid someone touches the pedal.

 

I have to jump in on this one... Slow master mufflers use baffles, reducing the flow characteristics. All noise with little to no real power benefit. I've always considered them to be a Chevy thing. All talk and no go.
Glasspacks won't last as long but they will flow better. Your best bet is to get a muffler with glass pack flow but better construction, such as Magnaflow as previously mentioned or Dynomax ultra flows.

 

Just cut the muffler off...you get all the flow you need then. LOL.

 

I vote Flowmaster or other chambered muffler over glass packs of any kind.

 

This is me, and this is what I want to put on my truck when I get that far

SLP Performance 310013919 - SLP Performance Loud Mouth Bullet Resonators - Overview - SummitRacing.com

Though I am going with a 3 inch version. They sound good all
around and I like them, but who is to say my taste is your taste ya know?

Here is a video of one on a truck at idle

2004 Ford F150 FX4 SLP Loudmouth 1 Exhaust - YouTube

Here is one being revved

SLP Loudmouth 5.3 Silverado - YouTube

 

I've always considered them to be a Chevy thing. All talk and no go.


Thats funny. Chevy has more wins in racing than any other brand.

 

Chevys are a good truck, just not my taste, but I do give them credit, they still make the most HP with a OHV system still!