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3 inch exhaust system

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Old Oct 26, 2011 | 02:57 PM
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Default 3 inch exhaust system

Is their any company that make 3 inch exhaust system with x pipe for a 71.
I would also like that they exit by the rear valence as the original one.

The headers i ordered are hooker super competition 1.75 x 3 po collector.
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Old Oct 26, 2011 | 03:04 PM
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All i find is 2.5 inch tube
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Old Oct 26, 2011 | 04:02 PM
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Nobody I know of. You'll have to have the system fabricated by a shop.
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Old Oct 26, 2011 | 04:26 PM
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Originally Posted by LB66383
You'll have to have the system fabricated by a shop.
Havent seen one yet that came in a box.
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Old Oct 26, 2011 | 05:16 PM
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Originally Posted by Fastfrank_z28
Is their any company that make 3 inch exhaust system with x pipe for a 71.
I would also like that they exit by the rear valence as the original one.

The headers i ordered are hooker super competition 1.75 x 3 po collector.
Smarter people also go with a "pass under" the tranny cross member to ease exhaust routing and make the pipes come straight back from the collector and keep heat away from the tranny
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Old Oct 26, 2011 | 08:58 PM
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No commercial kit that I know of. These are pics of the mandrel bent 3" on my '70 that was custom fabricated. It uses the stock tips and passes thru the frame at the tranny. My car would drag the pipes if it didn't go thru the frame since it's also lowered. My set up also uses a combination of band clamps and butt clamps so that it quickly comes apart if you need to work on something. Hope this gives you the inspiration to do it if you want to.









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Old Oct 26, 2011 | 09:59 PM
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Ray, that's some beautiful work there...
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Old Oct 26, 2011 | 10:14 PM
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THANKS for the compliment Billla!!

I probably should have said too that the pic back by the tire tub is before the new QA1 system replaced the leaf spring/Bilsteen set up & the new 12 bolt rear went in. It's even cleaner looking back there now.
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Old Oct 27, 2011 | 12:48 AM
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Originally Posted by Fastfrank_z28
Is their any company that make 3 inch exhaust system with x pipe for a 71.
I would also like that they exit by the rear valence as the original one.

The headers i ordered are hooker super competition 1.75 x 3 po collector.
I have FOR SALE complete set up In vary good condition,willing to make someone a good deal on complete kit off my 69 with 70 rear valence. Hooker ceramic coated super competition headers 1 7/8'' primaries 3'' collectors with custom built 3'' exhaust with H pipe and 3'' electric cutouts. Just before rear spring exhaust pipes merge (bolt on) into 2 1/2'' and go in to Magnaflow oval 2 1/2'' in 2 1/2'' out mufflers exiting by the rear valence as the original ones do in to custom made stainless square tips original look with 2 1/2'' exhaust through the tips, bolt on system. Just switched to Sidepipes recently, check my posts ( 3'' X pipe ) for pics, had X pipe with headman headers then switch to Hookers and re-modified the exhausts to H pipe. I can also e-mail few if interested, and will have good deal on shipping with employee discount.
Paja 503-329-7968

Last edited by Street Shaker; Oct 27, 2011 at 12:56 AM.
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Old Oct 27, 2011 | 08:18 AM
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Originally Posted by Street Shaker
I have FOR SALE complete set up In vary good condition,willing to make someone a good deal on complete kit off my 69 with 70 rear valence. Hooker ceramic coated super competition headers 1 7/8'' primaries 3'' collectors with custom built 3'' exhaust with H pipe and 3'' electric cutouts. Just before rear spring exhaust pipes merge (bolt on) into 2 1/2'' and go in to Magnaflow oval 2 1/2'' in 2 1/2'' out mufflers exiting by the rear valence as the original ones do in to custom made stainless square tips original look with 2 1/2'' exhaust through the tips, bolt on system. Just switched to Sidepipes recently, check my posts ( 3'' X pipe ) for pics, had X pipe with headman headers then switch to Hookers and re-modified the exhausts to H pipe. I can also e-mail few if interested, and will have good deal on shipping with employee discount.
Paja 503-329-7968
thanks for the offer but im really far from you, i think shipping will be huge.

i have a shop that can do it custom and they work really well. I was just looking for the possibility to buy them "in box" and save some $$.

I think i will go for a setup like Ray got!
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Old Oct 27, 2011 | 03:03 PM
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The hard part will be passing 3" pipes through the rear trans crossmember holes without hitting them and transmitting a lot of heat and vibration to the frame. They will have to be positioned just so........
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Old Oct 27, 2011 | 10:49 PM
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Originally Posted by gcusmano74
The hard part will be passing 3" pipes through the rear trans crossmember holes without hitting them and transmitting a lot of heat and vibration to the frame. They will have to be positioned just so........
Planning, planning, execution....
My don't touch the frame going thru the cutouts. Shim them in place before you weld where they pass thru the frame. Plan for torque rotation effect of the motor (set them low on the left and high on the right in the holes). Make a mount to hold them firmly in place. In the photo you can see the mount with a piece of spark plug boot insulator as the vibration pad, these were later replaced with small pieces of a silicone kitchen hot pad (honest Honey I don't know where that pad went) which is good to 500+F so it doesn't melt and is a better cushion than the fiber insulator.

Get mandrel bent pipe so you wind with reductions. Use 3" flow thru mufflers. Let her breathe!
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