H Pipe Kit?
Thread Starter
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Joined: Nov 2017
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H Pipe Kit?
Hi Folks
I am fighting a very loud and annoying exhaust drone after install the OEM style 1971 exhaust system. Many suggest an H pipe may help.
Does anyone make a bolt on H pipe kit that does not require welding?
Thanks-
I am fighting a very loud and annoying exhaust drone after install the OEM style 1971 exhaust system. Many suggest an H pipe may help.
Does anyone make a bolt on H pipe kit that does not require welding?
Thanks-
Thread Starter
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Joined: Nov 2017
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Pro
Joined: May 2016
Posts: 708
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From: Minnesota
I Don't think you'll find one labeled for a C3 specifically. Things like this are "universal" so you would find the size of your 2 main pipes and the distance between them, and then figure out which kit works for you. It may be weld-free but there will be cutting involved. They are basically clamp-in systems that you cut to fit in. All of our C3 exhaust systems are probably a little different - pipe size, exact distance between pipes, etc.
Le Mans Master
Joined: Mar 2004
Posts: 7,457
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From: Little Rock AR
An OEM replacement exhaust system should not drone at all. Something is wrong. Might be a leak? Might be a vibration?
An exhaust shop could just weld in an H pipe but maybe they can find something else that is causing the drone?
An exhaust shop could just weld in an H pipe but maybe they can find something else that is causing the drone?
Race Director
Joined: Apr 2003
Posts: 19,346
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From: Tampa, Florida
Thread Starter
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Joined: Nov 2017
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Oh wow! Stock system should not Drone? I thought they all did. The following is what I ordered from Corvette America. It was installed in to 1971 coupe with Manual 350. The drone is pretty bad and makes driving the car very unpleasant.
1969 1972 Exhaust System. 350 4 Speed 2 Inch - Separate Pipe & Muffler
http://www.corvetteamerica.com/part/...arnmoreid=4696
1969 1972 Exhaust System. 350 4 Speed 2 Inch - Separate Pipe & Muffler
http://www.corvetteamerica.com/part/...arnmoreid=4696
Melting Slicks
Joined: Jun 2003
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From: Niles, MI
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Tech Contributor
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
If you're not equipped to do any welding, my advice is bite the bullet and take it to a muffler shop. They can weld in an H pipe setup that is removable with band clamps or comes apart at some flanges. Have them put the crossover as far forward as possible (mine is right behind the header collectors, the most efficient place for a crossover). A properly placed H pipe does wonders for reducing drone and noise volume.