F150sc

Has anyone installed a Flowmaster 70 series Big Block muffler on there F150 I would like to know how it sounds.

F150sc

No input? Anyone!

ford4wd08

it will prob have a good sound but be fairly quiet, thats a big muffler, the bigger the muffler the quieter it is

TxOutlaw

Yeah, will be very mellow... I have true dual flow 40s on my 5.4L and it is really mellow for me and I am near 30 years old...

Darth Bama

There's nothing mellow about the 40 series??? If those are mellow to you then a 70 series would be like a factory muffler for you.

The 70 series is indeed a big muffler. The problem I have with it is it still suffers from cab drone. I have a buddy that installed one on his Tahoe and he hates it. He thought it was gonna be a lot more mellow then his F150 with a 50 series Flowmaster and honestly it's not. I have swapped my 50 Series out for the Hushpower line from Flowmaster. If you want performance over just flat out loudness, check into them. It's still Flowmaster and it's quality stuff.

TxOutlaw

The 2 40s have hardly any cab drone, but sounds nice outside. Decently loud when I get on it... The tips are angle out the back corners of the bumper. I need to install an X Pipe and possibly dump at the axle for a bit more noice... We'll see...

GATORB8

Flowmaster's website says the Hushpower only goes up to 2.5" I/O, isn't that a little small on a single exhaust on the 5.4, all the after market systems are 3-3.5".

Darth Bama

^^There's the Pro Series if you need something over 2.5"...

ford4wd08

flowmaster does make a kit that includes a resinator to get rid of the drone, ive seen it somewhere, i think its a big block series

F150sc

So the 70 series is okay then? I have 3 young children and don't want that much in cab drone,but want a growl when I get on it