anyone know why my flowmaster 44 i just got installed today sounds like **** and not like everyone elses? its more of a vibrating spitting noise than a nice rumble

 

Give it time to break in, should sound better in a couple days depending on how much you drive

 

Flowmasters usually take a while to break in...also depends on the diameter of the tubing you went with and if you left it fully in tact or dumped it before the axle.

 

Or the yahoo's put it on backwards.

 

It's fully welded. Only 25 miles on it and its the correct way. Yes it's dumped at the rear axle but its very clean the way the guy do it with a nice turn down and everything. Ill give it time to break in it looks like. Never knew a muffler needed a break in period

 

Here's a pic of the set up.

 

Anyone else?

 

I don't quite understand "break-in" either on a FlowMaster muff.......there's no packing material (fiberglass, ceramic, etc.), just some steel deflectors at various angles. Nothing to "break-in" but it must be installed correctly (specific inlet/outlet) and not reversed.

 

They DO break in. "Soot" or whatever must build up on the deflectors and change the way they deflect sound. Ive had probably 20 diff Flowmasters on everything from an 87 Z24 to a NASTY 89 IROC. They get louder and more "lumpy" sounding w age for certain

 

Ill be sea foaming it this week. Plenty of soot then lol. So you guys don't think it's because it dumps at the rear axle

 

If it's a rattling sound I would venture to say one of the baffles welds has broken

 

Only a small amount of soot will collect, then flake off and out the tail pipe it goes. If there's a rattle, something is loose. Any turn-down under the vehicle will be louder than a rear or side exit. Sound waves hit the ground/pavement and bounce back up to the bottom of the vehicle.

 

yeah my 44 sounded like **** from day one. just went with a new cat, highflow pipe and super 40 with a nice chrome tip. sounds awesome. nice deep rumble.

 

Ugghhh slow masters. None of them sound good. They drone, restrict flow, and sound crappy. It will get louder over time bc the chambers wear down

 

do you ditched the 44?