I found an exhaust noise solution.
Thread Starter
Heel & Toe
Joined: May 2003
Posts: 22
Likes: 0
From: HORSEHEADS NY
I found an exhaust noise solution.
In case anyone is looking for an elegant solution to a "too loud" exhaust, I recommend the "CC Insert" by car chemistry. (www.carchemistry.com)
I installed a "two disc" insert into the rear Y pipe just behind the cat. My system is a Magnaflow so it took at 3" diameter insert. Measure yours before ordering. (Car is 88)
It goes in very easily with a tight fit. I drilled a hole, tapped it, and put a bolt through both pieces to ensure it stays put after insertion, but frankly, the fit was so snug that I could not imagine it moving...but pipes do expand when hot so safety first. Car chemistry recommends putting some locktite on the bolt, or riveting or tack welding it in.
Results were a 3-6 db noise reduction (checked with meter, c-weighed)making the Magnaflow sound really nice without being overly loud.
Best of all, this solution costs only $45.00 and took about 30 minutes to install. In theory, it could be removed.
Hope someone finds this useful... :cool:
I installed a "two disc" insert into the rear Y pipe just behind the cat. My system is a Magnaflow so it took at 3" diameter insert. Measure yours before ordering. (Car is 88)
It goes in very easily with a tight fit. I drilled a hole, tapped it, and put a bolt through both pieces to ensure it stays put after insertion, but frankly, the fit was so snug that I could not imagine it moving...but pipes do expand when hot so safety first. Car chemistry recommends putting some locktite on the bolt, or riveting or tack welding it in.
Results were a 3-6 db noise reduction (checked with meter, c-weighed)making the Magnaflow sound really nice without being overly loud.
Best of all, this solution costs only $45.00 and took about 30 minutes to install. In theory, it could be removed.
Hope someone finds this useful... :cool:
Thread Starter
Heel & Toe
Joined: May 2003
Posts: 22
Likes: 0
From: HORSEHEADS NY
Re: I found an exhaust noise solution. (Patrick96LT4)
Huh?
Not sure I understand your reply to my post. Was it somehow inappropriate for the forum?
I did considerable research to find this solution, and thought others might benefit from it. I had never heard of Car Chemistry until I found their website two weeks ago.
Thanks
Not sure I understand your reply to my post. Was it somehow inappropriate for the forum?
I did considerable research to find this solution, and thought others might benefit from it. I had never heard of Car Chemistry until I found their website two weeks ago.
Thanks
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Re: I found an exhaust noise solution. (88FOURSPEED)
Sounds interesting, but wouldn't this kind of defat the whoel point of having a loud/free flowing exhuast, by putting something in the way to slow down exhaust flow and muffle sounds?
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: I found an exhaust noise solution. (MrNuke)
:iagree: But I guess its easier than yanking the whole exhaust again if you don't like it on the first try.
Melting Slicks
Joined: Aug 2001
Posts: 2,516
Likes: 0
From: Lockport NY
Re: I found an exhaust noise solution. (88FOURSPEED)
Was it somehow inappropriate for the forum?
I'm up around Buffalo; although they don't measure dB yet (except maybe State Trooper spotchecks), it's a good thing to know.
Some of these guys here who have to go through yearly smog checks might be interested, too. There's a post here somewhere about "visual" checks. I suppose if an inspector heard a loud exhaust, he might pay more attention to borderline emissions measurements.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: I found an exhaust noise solution. (Rich B.)
Thats a better alterantive than what I tried. I put a 1/4 piece of aluminum into the end of one pipe on each side and bolted it into the tube. I could take it out when I wanted to but it quieted the car down for the rides with the wife! :seeya :thumbs:
Burning Brakes
Joined: Feb 2001
Posts: 1,223
Likes: 0
From: Nashville Tennessee
Re: I found an exhaust noise solution. (88FOURSPEED)
Sounds like a possible solution for some people, I had thought of trying super trap, or spin tech, I wanted a performance exhaust sound with out being too loud, ( Im 50, The vette is a daily driver ) I have another car for loud, plus in my neighbor hood 2 chamber flowmasters will get ya pulled over in a hartbeat.
I haven't heard magnaflows on a early C4- But in my opnion they look like one of best choices out their for the L98, except I've read their loud and tend to have a drone on some automatic coups.
Some engines need some backpressure to run right, even the flowmasters have baffels inside to create some.
I got lucky on my system and got the sound I wanted without the drone, and it seems to flow fine, ( I went with 50 series flows -w- long tube heeders & a magnaflow cat. ) when the magnaflow cat was put beside the random tech and a flash light was stuck in the end of each the magnaflow looked like the best choice.
JMO_____YMMV__ :)
I haven't heard magnaflows on a early C4- But in my opnion they look like one of best choices out their for the L98, except I've read their loud and tend to have a drone on some automatic coups.
Some engines need some backpressure to run right, even the flowmasters have baffels inside to create some.
I got lucky on my system and got the sound I wanted without the drone, and it seems to flow fine, ( I went with 50 series flows -w- long tube heeders & a magnaflow cat. ) when the magnaflow cat was put beside the random tech and a flash light was stuck in the end of each the magnaflow looked like the best choice.
JMO_____YMMV__ :)
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