C4 Mufflers W/O DRONING
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,676
Exhausts are strange. Some people are more sensitive to drone than others. I flat out find it absolutely obnoxious. And the only options I have found that work on *my* modded cars. Headers/cats/corsa. Headers/stock exhaust system. Both of these combinations work to keep the drone down. And shockingly enough, the cat back with headers doesn't rob as much power as people expect it does.
Melting Slicks
Joined: Jan 2014
Posts: 2,192
Likes: 381
From: Lunenburg MA
I have flowmasters on my mostly stock '87 convertible. Just a little rumble, no drone even with the top down. I also have a '90 coupe that I put Walker quiet flows on. Very close to stock sound. Corsa is nice, but it's a significant percentage of what I paid for either car.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Exhausts are strange. Some people are more sensitive to drone than others. I flat out find it absolutely obnoxious. And the only options I have found that work on *my* modded cars. Headers/cats/corsa. Headers/stock exhaust system. Both of these combinations work to keep the drone down. And shockingly enough, the cat back with headers doesn't rob as much power as people expect it does.
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
I think you are right. Best we can do is use a decibel meter to gauge at various RPM. What we cannot do is tell if you find it obnoxious or not. If you cater to the "Loud Pipes Save Lives" group, anything short of illegal is good and the closer to the noise limit the better it is for them to impress the rice boys. What we cannot tell is how you will like the exhaust noise. Some like this and others like that.
Le Mans Master
Joined: Aug 2017
Posts: 6,943
Likes: 1,490
From: New Jersey
I always tell people to try and get a ride in a similar car to listen to the exhaust sounds. I had a Corsa on my 95, then transferred to my GS. I always thought the sound was tinny, but no drone with the stock cube LT4. Once I out in the 396, longtubes, no cats it was crazy loud and wouldn't pass tech at Englishtown for noise. I put on a 3" magnaflow and it was a deeper sound with minimal drone. Now I went with a bigger cam and heads at that has crazy drone now. I swapped out the magnaflow mufflers for another brand that is actually 3" not stepped down but haven't been able to drive it yet.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Working in and around E-town I'm suprised there was a tech for sound. I always thought they let you run it as loud as possible.. I did a lot of work in those developments right by 9 at union Hill which is a good 2 miles away and I could hear it clear as day lol. I loved it but could see others not.
Race Director
Joined: Oct 2000
Posts: 14,064
Likes: 1,166
From: N. Alabama
Few years ago I needed to replace the OEM mufflers on my '88. Went to the local Chevy dealer and was told that OEM mufflers are no longer available. The parts guy recommended Corsa so I had their cat back installed.
Good sounds, life-time warrantee and zero drone so well worth the price.
Good sounds, life-time warrantee and zero drone so well worth the price.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Aug 2017
Posts: 6,943
Likes: 1,490
From: New Jersey
my residential dead end street is used for local test and tune by reckless hooligans all the time around 2 am. One day a brick will go flying through their windshield while they're doing 110 in a 25 and that'll be the end of them. That being said, c17s doing touch and go's flying around my house all night is 100x worse than any vehicle I've ever experienced. I can pretty much sleep through anything.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
my residential dead end street is used for local test and tune by reckless hooligans all the time around 2 am. One day a brick will go flying through their windshield while they're doing 110 in a 25 and that'll be the end of them. That being said, c17s doing touch and go's flying around my house all night is 100x worse than any vehicle I've ever experienced. I can pretty much sleep through anything.
Le Mans Master
Joined: Aug 2017
Posts: 6,943
Likes: 1,490
From: New Jersey
like 2 officers on duty at night. Generally they're busy with other crap. Big town land wise, not enough guys. It doesn't happen regularly enough to pin it down either. I pretty much know who it is and I don't think he can ever legally have a license again either so like how further can they go.
Race Director
Joined: Jun 2020
Posts: 10,687
Likes: 2,251
From: north of Chicago
2025 C2 of the Year ('64-'66) Finalist - Unmodified
2025 C3 of the Year Finalist - Modified
2025 C4 of the Year Finalist - Modified
2024 C4 of the Year Finalist - Modified
2023 C2 of the Year Finalist - Unmodified
2023 C4 of the Year Finalist- Modified
2022 C4 of the Year Finalist - Modified
2022 C3 of the Year Finalist - Modified
2021 C7 of the Year Winner -- Modified
2020 C4 of the Year Finalist - Modified
like 2 officers on duty at night. Generally they're busy with other crap. Big town land wise, not enough guys. It doesn't happen regularly enough to pin it down either. I pretty much know who it is and I don't think he can ever legally have a license again either so like how further can they go.
Race Director
Joined: Jun 2020
Posts: 10,687
Likes: 2,251
From: north of Chicago
2025 C2 of the Year ('64-'66) Finalist - Unmodified
2025 C3 of the Year Finalist - Modified
2025 C4 of the Year Finalist - Modified
2024 C4 of the Year Finalist - Modified
2023 C2 of the Year Finalist - Unmodified
2023 C4 of the Year Finalist- Modified
2022 C4 of the Year Finalist - Modified
2022 C3 of the Year Finalist - Modified
2021 C7 of the Year Winner -- Modified
2020 C4 of the Year Finalist - Modified
I grew up knowing that government always looks at the squeeky wheel (complaints), you said he most likely lost his coupon, but does the POPO know he's still driving?
Not trying to hi jack thread, I myself have been living with the C4 drone for over 20 years ( muffler eliminators) but they do sound good rowing through the gears
Not trying to hi jack thread, I myself have been living with the C4 drone for over 20 years ( muffler eliminators) but they do sound good rowing through the gears
Last edited by walleyfisher; Feb 16, 2021 at 02:10 PM.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
like 2 officers on duty at night. Generally they're busy with other crap. Big town land wise, not enough guys. It doesn't happen regularly enough to pin it down either. I pretty much know who it is and I don't think he can ever legally have a license again either so like how further can they go.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
I grew up knowing that government always looks at the squeeky wheel (complaints), you said he most likely lost his coupon, but does the POPO know he's still driving?
Not trying to hi jack thread, I myself have been living with the C4 drone for over 20 years ( muffler eliminators) but they do sound good rowing through the gears
Not trying to hi jack thread, I myself have been living with the C4 drone for over 20 years ( muffler eliminators) but they do sound good rowing through the gears
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
my residential dead end street is used for local test and tune by reckless hooligans all the time around 2 am. One day a brick will go flying through their windshield while they're doing 110 in a 25 and that'll be the end of them. That being said, c17s doing touch and go's flying around my house all night is 100x worse than any vehicle I've ever experienced. I can pretty much sleep through anything.
Sat was muffled vehicles when we ran the Corvette Challenge there for years. There was a noise allowance of something like 95db @ 50' revving the car. Sunday was anything goes on sound.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
I was stationed at McGuire as a crew chief on C-141Bs back in 88-91. I worked grave shift and sleep thru the weekend reservist doing touch and goes all weekend. The A4's were constantly buzzing around too. Whenever I'm at East Coast Supercharging in Cream ridge I see the C-17's going around. They seem much quieter?
Sat was muffled vehicles when we ran the Corvette Challenge there for years. There was a noise allowance of something like 95db @ 50' revving the car. Sunday was anything goes on sound.
Sat was muffled vehicles when we ran the Corvette Challenge there for years. There was a noise allowance of something like 95db @ 50' revving the car. Sunday was anything goes on sound.
Burning Brakes
Joined: Jun 2001
Posts: 1,086
Likes: 40
From: Osage Beach,MO,USA
I grew up knowing that government always looks at the squeeky wheel (complaints), you said he most likely lost his coupon, but does the POPO know he's still driving?
Not trying to hi jack thread, I myself have been living with the C4 drone for over 20 years ( muffler eliminators) but they do sound good rowing through the gears
Not trying to hi jack thread, I myself have been living with the C4 drone for over 20 years ( muffler eliminators) but they do sound good rowing through the gears