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Super Moderator
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Discussion Starter · #1 ·
I want to "update" my stock exhaust system on my 1.9L stock 73 GT. I have seen many different ideas but I am simply wanting to get a little more "performance" and better sound.
Some of you have upgraded to a 2" pipe. Are there any modifications at the manifold in order to connect a 2" pipe? Is there a specific muffler that sounds good and will work better than others on our GT's?
Also, I know there are exhaust tips that have the resonators built into them instead of having a separate resonator as with the stock set up. Any exhaust tips that look and sound good that any of you have on your GT's that you think are good?
One last thing, as many of you know, when looking at the GT from the side, you can see the exhaust pipes hanging down under the car somewhat. With a 2" pipe, will that be more obvious or is there a way to "tuck" the system up under the car more so it won't rattle against the under body.
Thanks!
 

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Premium Member
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I was thinking about modifying the resonator to accept a 2" exhaust pipe so It would still look stock. Though I'm not sure what's inside of it, baffles? some sort of fiberglass? would it be possible to cut a bigger hole in the side of it for a 2" pipe?
 

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OPEL-LESS!!!
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2,116 Posts
i'm running just a tubular header with stock sized pipe, front muffler eliminated with just a rear resignator. i ran this setup with a stock manifold and head pipe, and was actually slightly louder than with the header. there is a video clip available of my exhaust, and dean also has a clip of his.
 

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Roy;
If you don't mind a trip down here to Jawja, I can put you onto the guy that has done all my Opels. He owns his own MIDAS shop, has quality people working for him. He has done all my systems, they don't hang down and they never give you any problems. The system he did on my GT allows me to run "pencil" tips that can be swapped out on show day so that you'll have great looking chrome tips every time.
Gene
 

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Discussion Starter · #5 ·
Gene,
I may just take a trip down to see what you have. I will send you a private e-mail to see when I good time is to come! What size pipes did he use and did he install a "muffler" in line before the resonator tips?
 

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Roy;
He used 2" pipe, and there's only one muffler, it is the one in front of the axle, under the passenger side of the car. That is a MIDAS turbo muffler. As for the rear section, there is no resonator. He bent me a "U" shaped pipe, to match the openings and bent a pipe over the axle to meet up with the muffler. The chrome tips are removeable to clean/replace.
Gene
 

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"Stock" engine exhaust sizing

The MAIN thing I would add to the previous posts here is to go NO LARGER than 2" pipe on a basically stock or slightly modified engined car. If you increase the size of the pipes after the junction of the exhaust manifold down-pipes too much, you'll destroy exhaust velocity and low RPM torque with it. Everyone knows we don't have that much to begin with! :rolleyes:
 

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Reborn Opeler
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32 Posts
LT collector pipe

I was wondering about the LT collector @ suselbeek. It looked like it had larger diameter primaries. Is it different than the stock 1.9 collector? I see someone mentioned the difference between the 1.9 and the 2.2-2.4 sprint manifold collector flange size.
Here is my question. I have a 1.9 carbureted engine with mid to top end cam and would like a sprint manifold, good collector and 2" exaust pipe system. What is the best manifold and collector for this and where can I find the manifold?

thanks
 
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