Oldsmobile 350 Dual Exhausts in a 80 G Body El Cam!no

Chuck Cole

Chuck Cole

Not-quite-so-new-guy
May 10, 2017
45
40
18
Granite Falls, WA
#11
I had mine custom made for $500 on my regal. I have the thorton 350 jrs on my 350
Custom pipes look awesome also

I had bought that jegs gbody system and its sitting in my garage. Im trying to sell it right now. Night and day from custom pipes
That is good to know. I had that earmarked so I will skip them and bite the bullet. Thank you!
 
fleming442

fleming442

Geezer
Dec 26, 2013
5,541
6,165
113
#12
I think the main difference you'll see between a "bolt on, cat back" vs a custom exhaust is mandrel bend vs kinked tubing. If you're not after every last ounce of Go Juice, the kinks in a custom system won't matter. There's also material choice- SS or aluminized.
 
olds307 and 403

olds307 and 403

Comic Book Super Hero
Oct 14, 2008
4,088
1,915
113
Melville,Saskatchewan
#13
I will take a pic today. The Ramair Restorations downpipes are manderal bent and look very nice. Pypes also offers some but there have been issues with fitment lately, including their Olds downpipes. I assume you have the early manifolds which all the down pipes are designed for, as the passenger outlet angle is different vs later manifolds.
 
olds307 and 403

olds307 and 403

Comic Book Super Hero
Oct 14, 2008
4,088
1,915
113
Melville,Saskatchewan
#14
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20190412_074550-jpg.110932
 
Chuck Cole

Chuck Cole

Not-quite-so-new-guy
May 10, 2017
45
40
18
Granite Falls, WA
#15
I think the main difference you'll see between a "bolt on, cat back" vs a custom exhaust is mandrel bend vs kinked tubing. If you're not after every last ounce of Go Juice, the kinks in a custom system won't matter. There's also material choice- SS or aluminized.
Mine will be a driver/cruiser not a strip burner, so a little ding here or there does not bother.
 
Chuck Cole

Chuck Cole

Not-quite-so-new-guy
May 10, 2017
45
40
18
Granite Falls, WA
#16
I will take a pic today. The Ramair Restorations downpipes are manderal bent and look very nice. Pypes also offers some but there have been issues with fitment lately, including their Olds downpipes. I assume you have the early manifolds which all the down pipes are designed for, as the passenger outlet angle is different vs later manifolds.
Thank you! Man that is a lot of cutting and welding :friday: I can cut, just cannot weld...and don't know anyone that can so I would end up in a shop anyway! Nearest shop to me is 25 miles and they want to put everything back to stock.
 
olds307 and 403

olds307 and 403

Comic Book Super Hero
Oct 14, 2008
4,088
1,915
113
Melville,Saskatchewan
#17
I am not a great welder either. I got the guy at Minute Muffler in Yorkton, Saskatchewan to bend and weld the down pipes in 2.5". He balked at the 2.5" size but did a good job. The hump position on the crossmember is also different between A and G bodies.
 
pagrunt

pagrunt

Comic Book Super Hero
Sep 14, 2014
3,552
3,916
113
Shelocta, Pa
#18
The hump position on the crossmember is also different between A and G bodies.
That would be referring to the '77 & older right? The only difference would be the TH200 4R crossmember having to be back farther.
 
olds307 and 403

olds307 and 403

Comic Book Super Hero
Oct 14, 2008
4,088
1,915
113
Melville,Saskatchewan
#19
That would be referring to the '77 & older right? The only difference would be the TH200 4R crossmember having to be back farther.
Yes, compared to my 70 Cutlass, the system off my G body fit it well except it hit the inner edge of the hump at the X pipe.
 
roger1

roger1

Master Mechanic
Aug 23, 2010
337
367
63
San Angelo, TX
#20

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