how loud would a flowmaster 40 dual exhaust be with stock cat?
Thread Starter
CF Active Member
Joined: Mar 2010
Posts: 122
Likes: 0
how loud would a flowmaster 40 dual exhaust be with stock cat?
i have a 93 silverado with a rusted exhaust. Theres a nice sized rust hole in the muffler and the tailpipe has big rust holes in it. The muffler shops around here cannot do true duals without a cat because of federal law. Would a original flowmaster 40 with 3 inch piping and 2 tailpipes coming out of the sides be any louder than stock? Would you be able to hear me coming up the street or is it not that loud?
CF Junior Member
Joined: Jan 2010
Posts: 38
Likes: 0
From: Malden
I just installed a Flowmaster, duel exit out back, 40 seriers on my 09 silverardo v6, 4.3 it sounds great, a little poppie at sometimes but I thinks it because of the v6. Nice low mouning when I exited the garage I park in at work. I think you like it.
CF Veteran
Joined: Nov 2009
Posts: 1,039
Likes: 1
From: sacramento,ca
if you have a v8 it would sound good. i have an 04 that i put an exhaust system on with 40 series flowmaster single in dual out and it sounded good but wasnt loud enough for me. so i put a 10 series race muffler on my truck. its pretty loud and sets off alarms. the 40 series wont be near as loud but youll still be noticed.
x2 with davey.
x2 with davey.
CF Senior Member
Joined: Feb 2010
Posts: 428
Likes: 2
From: Hanover County, VA
I have an '04 Silverado 5.3L and recently had a Flowmaster "50 Series" exhaust system installed. My truck has factory-installed dual cats; and I have true duals with twin pipes, two mufflers and dual pipes straight out the back.
It sounds awesome - louder than the '70' Series mufflers, but quieter than the '40' Series Flowmasters. Nice, throaty idle - aggressive sound under acceleration and it quiets down a bit once I get up to highway speed. You hear my truck coming, but it won't wake the dead. I often leave for work at 3am, so I try to be nice to my neighbors. LOL!
P.S. Flowmasters are warranted for life, at least where I got them.
CF Beginner
Joined: Jun 2010
Posts: 2
Likes: 0
From: Las Vegas, NV
if you have a v8 it would sound good. i have an 04 that i put an exhaust system on with 40 series flowmaster single in dual out and it sounded good but wasnt loud enough for me. so i put a 10 series race muffler on my truck. its pretty loud and sets off alarms. the 40 series wont be near as loud but youll still be noticed.
x2 with davey.
x2 with davey.
Last edited by gordonjj; Jul 14, 2010 at 3:38 PM.
