Big difference between flowmaster 40 series and 40 series delta flow???
 

I have true duals on my TBI 383 and i went with Flowmaster 40 series delta flow mufflers. I was expecting it to be pretty loud and deep but i am sort of disappointed. Its actually pretty tame and quiet and it just doesnt have that deep sound i was looking for. Running long tube headers and no cats. Do you think a switch to a true 40 series muffler would make much of a difference?

Re: Big difference between flowmaster 40 series and 40 series delta flow???
 

Delta flow's have an extra baffle in them to try to cut down on drone. They are also not as loud as a regular 40 series.

Re: Big difference between flowmaster 40 series and 40 series delta flow???
 

I'd like to trade my 40's for the Delta flows..Never heard of them.
Mine droned so much that I put resonators in front of the mufflers to help quit it down.
Now after about 8000 miles it seems like they are getting louder..I have stock manifolds.

Re: Big difference between flowmaster 40 series and 40 series delta flow???
 

Well i can say for a fact that there is absolutely no drone to these mufflers at all. Maybe i should be happy about that and stick with them. LOL

Re: Big difference between flowmaster 40 series and 40 series delta flow???
 

I had 2.25 40 series on my '86 305 C10 and those were still rather tame. Duals to the rear though, dumps would have been louder.

I had 2.5 40 series on my old '86 Trans Am and those were loud, but echoed a bit due to being a hatchback.

I'm going to swap out my 2.5 glasspacks for 3" 40's on my '76 cammed/headers 454 Sierra. 3" just has a lower tone to it that 2.5 will never have. Since I only drive this when I haul a load or start jones-n for the sound of a cammed big block, the louder and more obnoxious the better!