Big Block Downpipes
 

Where can I find downpipes for my 69 396?

I'm using the stock exhaust manifolds.

Re: Big Block Downpipes
 

Any exhaust shop can make them.

Gary

Re: Big Block Downpipes
 

Actually, he/she/it said Downpipes, so only a Downpipe shop can provide such a mythical beast...

Re: Big Block Downpipes
 

I searched all over the internet for some and never found any, post up if you find some.

Re: Big Block Downpipes
 

Am I thinking of something different then just a pipe with a 2 or 3 bolt flange that bolts to the manifold and then is bent to mate up with the rest of the exhaust?

Gary

Re: Big Block Downpipes
 

Yes that is what he is asking about.
I hate going to exhaust shops, just bad experiences there and would rather buy the correctly bent piece.
And if I order the right part I don't have to drive or trailer the truck to the exhaust shop with open exhaust.

Re: Big Block Downpipes
 

I'm well aware that any muffler shop can make some pipes with crushed bends, but I'm hoping I can find some nice madrel bent factory made pipes.

Pypes, Flowmaster and other companies have them for 60's & 70's Chevy big block cars, but I haven't found them for our trucks.

I've got an email out to Pypes Performance Exhaust. I'll share what they tell me.

Re: Big Block Downpipes
 

???

Re: Big Block Downpipes
 

You, are a troll! Leave people alone! Is this the best thing that you have to do with your time? Just go through other people's posts and troll for any little thing that irritates you?

#JERK

Re: Big Block Downpipes
 

Try these guys, I know, I know, its a muffler shop. Yet they make all the stuff so you can make your own!

Re: Big Block Downpipes
 

Did you forget to include a link or a name?

Re: Big Block Downpipes
 

Why so serious...everyone seems to get quickly bent outta shape over stupid crap here. Just laugh and move on... A down pipe is what connects the exhaust to the outlet of a turbo in the most normal essence of the word.

here is a diagram with part numbers from napa, they should easily cross to walker. if you need it bigger PM me with your e-mail and I'll forward it.

Attachment 1630103

Re: Big Block Downpipes
 

https://www.gbemandrel.com/

There fixed it!

Re: Big Block Downpipes
 

On Jegs you can buy weld up header kits that are mandrel bent, not sure your looking to do that tho. just a thought

Re: Big Block Downpipes
 

Walker uses the same diagram and numbers, unfortunately those are only the numbers for clamps, hangers, gaskets and mufflers. No pipe numbers. I did email Walker and I called Napa. Napa doesn't offer it and they told me to try The Truck Shop. The Truck Shop doesn't have them.

Re: Big Block Downpipes
 

I have looked at that site. The Marman Flanges are pretty cool. But, they don't have anything for the downpipe flange at the manifold.

Re: Big Block Downpipes
 

Jegs does have this downpipe, it looks close in the photos and they offer free shipping. Maybe it's close a enough fit, that a little tweaking would make it work.

Pypes responded to my email and said that the don't offer a downpipe for our trucks.

PYPES DGU20S
Downpipes 1970-81 Camaro 1964-77 Chevelle & El Camino Big-Block Chevy

http://www.jegs.com/i/PYPES/958/DGU20S/10002/-1
Attachment 1630195

Re: Big Block Downpipes
 

On those cars the RH exhaust manifold is the same, the left is different but close. I have been thinking of using these pipes. I just bought corvette exhaust manifolds though and they sweep down and back so now that I have those they wont work, if you try them post up with the results.

Re: Big Block Downpipes
 

When I lived in Pierce County eons ago, I used to take my rigs to Walt's on Pacific Avenue... they always did a great job installing custom exhausts.

Or if you have access to a welder and have a bit of skilz, you could order the flange you need and then buy a stick of pipe in the diameter you want and also a couple of 45's or some 90's and cut and weld it up yourself.

Gary

Re: Big Block Downpipes
 

I recently used this in my 71 with a 402. They tucked in nicely in the frame rails. The passenger side fits perfect. The driver side fits if you use a short filter or you can easily modify the driverside with one cut and reweld.

Re: Big Block Downpipes
 

That is great to hear. Did you modify the pipe or use a shorter filter? Do you have any photos?

Re: Big Block Downpipes
 

I used a shorter filter. I also cut both tails off.

Re: Big Block Downpipes
 

Reviving an old thread with a similar question, Looking for downpipes for a '68 396 factory manifolds...???

I'm simply looking for a economical ($300-$500 range) functional exhaust, does not need to be full factory. I 'thought' I'd find a system, use what I need and go from there, but this is proving a bit more of a challenge.

Short of trying to find a shop to make something (as in $$$) I'm probably going to piece it together myself. I'm fine with this, but I've not yet been able to find downpipes (396 w/manifolds).

Does anyone know of any source?


Thanks,
Kevin


Adding, I am aware that it appears the original poster may have opted for the Pypes downpipes, but I'm not sure I'm keen on going with a shorter filter.
I am also aware companies like Waldron's make a full system, but I'd rather not end up spending close to $800 for a system.


A photo of the truck, where exhaust currently exits front of rear tires under utility bed (where I am planning to keep it):
https://photos.imageevent.com/hvclas...819_183140.jpg

Re: Big Block Downpipes
 

When I did my truck, the only people that I found that supplied dual exhaust down pipes for our big block trucks was Waldron Exhaust in Michigan. They made me 2 1/2" exhaust pipes for mine, that I cut off behind the cab, and adapted to a 2 1/4" muffler system that I bought from LMC I think. Waldrons is usually backed up, and it takes awhile for them to make a run of any certain pipe, so I had to wait awhile for them.

Re: Big Block Downpipes
 

Took my bbc to exhaust shop, $350 dual exhaust with tail pipes, custom bent. I supplied thrush mufflers..

Re: Big Block Downpipes
 

I'm looking around locally to see if I can find a shop that will/can even do it. IF I find a place to do it even close to that, it will for sure go that route. For $350, that is extremely reasonable. ; )

Re: Big Block Downpipes
 

Most any exhaust shop can do it. Probably the simplest update to a truck. In NY you have 500 more exhausts than most of us within a reasonable drive.

Re: Big Block Downpipes
 

Update: Posting as reference for others.
After having no luck finding a local shop I decided to call Waldron's to see if they would sell partial pipes/systems. To my surprise, the answer was YES :)
I'm not planning to run my system all the way back, I already have a set of Flowmaster mufflers, etc. so the critical piece for me is the DropDowns.
After talking to Ruth (very nice lady at Waldrons ;) she said they can cut the main pipe (that runs from manifold to muffler, ref photo in link) to whatever length I wanted. We decided on 5', so that should be more than enough to get me to where I'm going to place the Flowmasters.

The more I looked at all the bend detail as the pipes exited the manifolds, the more I was thinking it was going to look too "Frankenstein-ish". Getting the dropDowns from Waldron's will make this a whole lot cleaner and for just over $200 will still keep the system in the budget ballpark. Adding here, for pipes larger than 2" (these will be 2.5") they use 14 gauge, which is pretty solid.


https://waldronexhaust.com/product/1...With+Pipes+Cut

Re: Big Block Downpipes
 

you're right,Kevin,Waldron's in Michigan does great work.i've used them several times having their parts on my 67 Impala wagon and tailpipes on my 72 big block truck.i worked in a muffler shop a 100 years ago,ran the bender,and made custom stuff everyday.muffler shops are now like rad shops,dissapearing.there is a muffler shop here with a bender and terrified to use it i guess?they order in straight pipe when they need it,none on hand??the world is nuts,a muffler shop with no pipe?like an airline with no airplanes?i deal with Ruth too,super nice.i asked her to have my truck tailpipes made from 2 1/4 rather than 2 inch,$20.00 more but who cares,no big deal and they fit like a glove.i recommend them every time someone asks me about exhaust stuff.

Re: Big Block Downpipes
 

67GMC C20

Who did you use in Medina? Tailpipes out the back, straight or to corner of bed?

Thanks.

Got a 69 396 Longhorn, has pipes in front of wheels, its ok, but would rather send it to the corners of the bed at the rear.

THanks
LILREDGMC

Re: Big Block Downpipes
 

B & M mufflers in Sarahsville, Ohio. Not far from Pittsburg.

740-732-5509

He does all the exhaust in this region. He did a 427 chevelle with manifolds, and my 67 small window, with BBC and manifolds. He used some of the stainless exhaust I had from the V6 duals. He custom bent down.pipes. I had exhaust flanges, for the manifold.

Can't beat his quality and cost.

Re: Big Block Downpipes
 

I've had quite a few comment on the sound of the Hush Thrush thru tail pipes out the side.