I have a '90 F150 with a inline 6... i believe its 4.9L... want to put some flowmasters on but not sure which series is best for me. I want a good deep rumble, just not ear peircing loud. Any Ideas???

 

You'll want the 50 series.

 

id go with one of the 40 series of the good ole super 44

 

ok, now i'm torn, one says 40 one says 50???

 

you can only hear the 50 when you get on it.

you can hear the 40 sometimes even when you don't smash the throttle.

i thought the 50 was too quiet

 

yes, get the super 44 you wont be disappointed, they sound good on anything lol, even a civic.....well maybe not

lol sorry darren i usually dont go against your advice

 

Well he requested not ear piercing loud which the 40 series line can be, so thats why I suggested 50. I would actually rather suggest the 14" body Magnaflow.

If you want a good loud deep muffler, the Super 44 is the only Flowmaster worth buying. The rest will just restrict your flow too much, Super 44 is their best flowing muffler.

 

ohhh! so my 10's restrict to much i dont think those little suckers restrict at all haha

 

Well I can almost guarantee you, due to the pressure and scavenging of an exhaust system, with the two mufflers, if not atleast both equal, the Super 44 could flow better than the 10 series.

10 Series Delta


Super 44 Series

 

single in/single out???
single in/dual out???
true duals???

best sound???

 

depends on what you prefer. they'd sound pretty much the same. i like dual more because then you can have one pipe on each side of the truck and you can enjoy the exhaust while annoying the hell out of the people you pass.

 

im about to put the 50 on mine, ill letcha know how it is in a week or two

 

Your best bet is to stay with a single exhaust, no not get a true dual system unless you want to lose performance.

If you want the look of dual outlets then get a si/do ( single in, dual out ) muffler.

 

so don't go with the 10 series delta,just the 10 series-- mine only has 1 baffle

 

All Flowmaster 10 series are Deltas. There is no non Delta 10 series by Flowmaster. Your muffler isn't a real Flowmaster I thought, I thought it was a replicated & refined 10 series.