Flowmaster 40s on a 96 LT4??
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 2,813
Likes: 503
From: West Chester Ohio
2018 C4 of Year Finalist
Flowmaster 40s on a 96 LT4??
I have heard a couple of youtube clips of late model c4s with the 40s and a resonator delete done. Im sold an want to buy a set but i cant find what the part number is for these mufflers. My hope is to use my stock tips to keep a factory look.
Any help would be appreciated
Any help would be appreciated
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
Or a single inlet, single outlet and your choice of tips. Either way the drone is going to be super annoying. I liked the way my car sounded when I had FM 40s, but I got really tired of the fillings be rattled out of my head. 
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 2,813
Likes: 503
From: West Chester Ohio
2018 C4 of Year Finalist
Did you have any other exhaust modifications headers, x or h pipe ect?
Do you recall the orientation of the inlet and outlets on the muffler ie. Center center, center offset ect??
Last edited by OH THREE Z; Aug 3, 2017 at 05:40 PM.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
This is a "pick your poison" question....
If you are okay with lots of drone remove everything except for 40s....
If you are okay with some drone, remove your resonator, keep you cats and put on the 40
If you are OK with a bit of drone(with a bit of punch) put in a resonator with an "X"pipe and 40s and remove the cats.
If you want no drone.... leave it stock
If you are okay with lots of drone remove everything except for 40s....
If you are okay with some drone, remove your resonator, keep you cats and put on the 40
If you are OK with a bit of drone(with a bit of punch) put in a resonator with an "X"pipe and 40s and remove the cats.
If you want no drone.... leave it stock
Last edited by billschroeder5842; Aug 3, 2017 at 08:57 PM.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 2,813
Likes: 503
From: West Chester Ohio
2018 C4 of Year Finalist
I had a C5Z with loudmouths.. i aint skeered of noise or drone
I might switch to the ready made muffler eliminators. I know they will fit and give me the stock look that im after.
I have a spare LT4 exhaust that i bought on the cheap. Im going to replace the resonator with straight pipes as well as drill two half inch holes near the rear split to balance the exhaust. If it rattles my brain so be it and if its unbearable i wont be out a ton
Im picking the car up next week and its the first mod i plan on doing
I might switch to the ready made muffler eliminators. I know they will fit and give me the stock look that im after.
I have a spare LT4 exhaust that i bought on the cheap. Im going to replace the resonator with straight pipes as well as drill two half inch holes near the rear split to balance the exhaust. If it rattles my brain so be it and if its unbearable i wont be out a ton
Im picking the car up next week and its the first mod i plan on doing
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 196
From: folsom california
oh dear god don't. Flowmaster 40's, no reasonator; I bought my 96 lt4 with that exact set up...probably the reason the previous owner sold it... WORST EXHAUST SYSTEM EVER
Last edited by mtwoolford; Aug 3, 2017 at 11:56 PM.
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Le Mans Master
Joined: Dec 2005
Posts: 8,575
Likes: 961
From: Communist Colorado
I have an all stock 86 exhaust with Flowmasters, though Im not sure what series they actually are. I couldn't see any number on them. Little to no drone though and they have a nice deep sound... nothing obnoxious or dump truck sounding....
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
With no changes other than Corsa mufflers, it is now enjoyable to drive. Its a little more quiet at idle than with the FM 40s, but wayyyyyy louder at WOT..........but still no drone.
Burning Brakes
Joined: Nov 2015
Posts: 762
Likes: 94
From: Airdrie Alberta
I run a set of flowmaster 40's and dual 3in exhaust on my 85 car. The exhaust is noisy, I'm probably at some point going to change mufflers and/or add resonators. My 85 has a LQ9 engine with headers.
Idle isn't bad, but wot is quite loud.
I don't even turn on the radio any more.
Idle isn't bad, but wot is quite loud.
I don't even turn on the radio any more.
Drifting
Joined: Dec 2011
Posts: 1,439
Likes: 23
From: mesa az
I have had Flowmaster 40's on my modified L98 for years. The drone takes getting used to with city driving. Long tube headers with Magnaflow cats the 40's. Drone is there but not too loud.
Last edited by C4in mesa; Aug 13, 2017 at 12:54 PM.
Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
the flowmaster catbacks for C4s arent bad seem to me much quieter;delta flow 50s not too bad
The "original 40s" you are going to fn hate it.
Had a set of those on an 86 5.0 when they first came out, was young and loved "loud". After 30 minutes it was obviously a huge mistake.
If you want the effect of a cow moaning inside a metal trash can go for it thats how its going to sound all the time
Last edited by cv67; Aug 13, 2017 at 11:53 AM.
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 196
From: folsom california
the flowmaster catbacks for C4s arent bad seem to me much quieter;delta flow 50s not too bad
The "original 40s" you are going to fn hate it.
Had a set of those on an 86 5.0 when they first came out, was young and loved "loud". After 30 minutes it was obviously a huge mistake.
If you want the effect of a cow moaning inside a metal trash can go for it thats how its going to sound all the time
Melting Slicks
Joined: Jan 2008
Posts: 2,054
Likes: 120
From: AZ
I went to a monster audio system for those occasions when that sweet hum of power..... well, some of you know! Lower cruising RPM has decreased the interior exhaust sound, a result of the ZF 6-speed.
Ah, I was just wondering, as a Cheesehead, how that would sound; never experienced it!
4th Gear
Joined: Aug 2017
Posts: 4
Likes: 0
From: Arizona
I have heard a couple of youtube clips of late model c4s with the 40s and a resonator delete done. Im sold an want to buy a set but i cant find what the part number is for these mufflers. My hope is to use my stock tips to keep a factory look.
Any help would be appreciated
Any help would be appreciated
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 196
From: folsom california
I have heard a couple of youtube clips of late model c4s with the 40s and a resonator delete done. Im sold an want to buy a set but i cant find what the part number is for these mufflers. My hope is to use my stock tips to keep a factory look.
Any help would be appreciated
Any help would be appreciated
BUT WHY? you'll find the answer to THAT question soon enough.
