Bent Exhaust???
Thread Starter
Pro
Joined: Nov 2004
Posts: 585
Likes: 0
From: Royal Oak MI
Bent Exhaust???
Hey all,
I'm getting ready to patch up my exhaust where I cut it behind the tranny, and it appears that the 2 1/2 " pipe was flattened from that point all the way to the mufflers. Looking in the AIM it seems like that was stock. I assume that was done for clearance, so I guess my exhaust might be original.
So my question is should I have that done now ?, It would seem like the inside flow area of the pipe is the same when it is flattened, but all of the pictures of everyones new exhaust systems are not done that way. Why?
Thanks
I'm getting ready to patch up my exhaust where I cut it behind the tranny, and it appears that the 2 1/2 " pipe was flattened from that point all the way to the mufflers. Looking in the AIM it seems like that was stock. I assume that was done for clearance, so I guess my exhaust might be original.
So my question is should I have that done now ?, It would seem like the inside flow area of the pipe is the same when it is flattened, but all of the pictures of everyones new exhaust systems are not done that way. Why?
Thanks
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
The problem is that no of the IDIOTS! making systems now flatten the pipes when they pass under the differential like the factory did. My 54K mile "survivor" LT-1 had the best muffler tone of any Chevy I have owned since my 69 302 Z/28 with a "deep tone" muffler yet, if you try to buy a "original exhaust" you don't get the correct mufflers. Corvette Central is one of the few that is making systems where the mufflers are welded onto the rear pipe for a "correct" factory appearance (screw the originality and go with an aluminized replacement system.)
Thread Starter
Pro
Joined: Nov 2004
Posts: 585
Likes: 0
From: Royal Oak MI
I guess my pipes are orig then, but they are really bad with a couple holes where they turn to go into mufflers (Flowmaster 40's).
Im going to get some Dynomax ultra Flows for the new pipes, because you can't hear inside the car and my wife complained that they rattled the windows in the house.
I don't think new pipes with the droanmasters will make much difference.
Im going to get some Dynomax ultra Flows for the new pipes, because you can't hear inside the car and my wife complained that they rattled the windows in the house.
I don't think new pipes with the droanmasters will make much difference.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Any time you flatten or even bend the pipe with out mandrel bending the pipe will lose some of it's diameter, I got the mandrel bent 3 inch pipes because I didn't want to lose any flow. I still have plenty of ground clearance
Don't get the DroneMasters you will be sorry I am replacing mine with Super Turbos this weekend
Don't get the DroneMasters you will be sorry I am replacing mine with Super Turbos this weekend
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
You are correct. Pipes flattened into a D shape were stock and done for clearance purposes. It's not likely a muffler shop (or previous owner) went to the trouble of flattening a set of replacement tubes, so your pair are probably original. I'm still running the original D pair on my '68. They show their age, but they're still under there.
