Exhaust Advice Please - Pontiac GTO Forum
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post #1 of 7 (permalink) Old 02-27-2014, 03:41 PM Thread Starter
 
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Exhaust Advice Please

I had ordered a Pypes X-pipe header exhaust for my '67 GTO in 2 1/2" size. Today I opened the box and it is 3" size. Question(s): Is there any large difference in tone/volume between the two? Is there any realistic performance improvement with less restriction of the 3"? I don't want my car to sound like a mud racing 4X4 pickup truck!! I will be running a fresh RA III motor. Thanks.
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post #2 of 7 (permalink) Old 02-27-2014, 04:40 PM
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Originally Posted by chemnick View Post
I had ordered a Pypes X-pipe header exhaust for my '67 GTO in 2 1/2" size. Today I opened the box and it is 3" size. Question(s): Is there any large difference in tone/volume between the two? Is there any realistic performance improvement with less restriction of the 3"? I don't want my car to sound like a mud racing 4X4 pickup truck!! I will be running a fresh RA III motor. Thanks.
Chemnick
Honestly I would return the 3" system and have them send you the proper one.

And make sure they pay for the shipping, it was their error!
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post #3 of 7 (permalink) Old 02-27-2014, 07:02 PM
 
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I agree, unless your running big HP the 3" are overkill.

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post #4 of 7 (permalink) Old 02-27-2014, 07:04 PM Thread Starter
 
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Thanks. The swap deal was easy to do (Summit). No BS, no problems.
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post #5 of 7 (permalink) Old 02-27-2014, 07:24 PM
 
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Actually they did the same thing to me except sent 2" instead of 2.5. They were on the ball with getting them swapped. If you are installing yourself i would recommend upgrading to the stainless band clamps or having them welded after you get them roughed in and marked.

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post #6 of 7 (permalink) Old 02-27-2014, 10:05 PM Thread Starter
 
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Thanks. As luck would have it, I had ordered the 2.5" band clamps, which came in today.
Thought I was about to put it all together when I opened up the box. Another delay. And so it goes..............................
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post #7 of 7 (permalink) Old 02-27-2014, 10:08 PM
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Also... the 3" system would have HURT your performance, not helped it....

You done good.

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