Mandrel Bent SS downpipe

[whitexj98]

I'm redoing my exhaust front to back, stumbled across this place out of New Jersey, UPSW Auto Parts selling a mandrel bent Stainless Steel down pipe. They come from China under the name Northeastern Exhaust.. ordered it up and sure enough it's real. Haven't installed yet as I'm still waiting on other parts but figured I would pass along. I have never seen a mandrel bent downpipe available, let alone SS. If you can't find it on their website they sell on eBay also.

 

[RCP Phx]

The downside is they are stock in size and they don't use the right grade of SS (besides their minimum selection).

 

[maxbraketorque]

The downside is they are stock in size and they don't use the right grade of SS (besides their minimum selection).

Yep, 409/410 SS is commonly used on OEM exhaust systems. Better than carbon steel, but not nearly the same as 304 SS.

 

[Anak]

Still nice to know the option exists.

I am happy with the stainless tail pipe I got off ebay.

I am bummed the Borla 17039 stainless header/downpipe is no longer available. Having options is good.

 

[Agreen]

It's nice to not have the "we totally did this to clear the axle, but in reality it's probably for emissions" exhaust kink though.

 

[4x4JeePmaNthINg]

Are you welding this to the stock exhaust pipe or is stock carbon?

 

[Evan03]

Its very low stainless content itl weld fine with anything handy.

 

[OBXJeepGuy]

Any part number for this? I couldn’t find it in their website. I’m probably wasting my time, as this also won’t fit a Renix 4.0.

 

[Agreen]

305108

At least that's what they list on their eBay page. I didn't see it on their website either. I went back and searched that number and got a Civic muffler?

https://www.ebay.com/itm/Stainless-...556494?hash=item288c00d48e:g:UFIAAOSwqR5eOI~n

I don't have any data on whether it fits a Renix XJ or not.

 

[OBXJeepGuy]

Awesome. Thanks for the info!

 

[Evan03]

Youl need the ho exhaust manifold to go with it

 

[Evan03]

Youl need the ho exhaust manifold to go with it

 

[jeepingben]

Mine arrived on Thursday

The flange that mates it to the manifold is much bigger + is not quite the same. The restrictive dent is gone though.

The locking flange nuts I was using before aren't compatible. I don't thing regular hex spring locknuts will work either. It almost needs a conical nut or at least a small thick washer.

I was not able to get a good seal to the manifold yet. I will try different nuts and hopefully more even pressure will let it seal.

 

[Anak]

Well that isn't right.

Bummer.

Simplest solution is probably going to be a thick washer, and you will need to grind one side of it.

I would be inclined to tack weld the washers to the flange.

 

[Ralph77]

Well that isn't right.
Simplest solution is probably going to be a thick washer, and you will need to grind one side of it.

Did the same thing.
Put a whole new exhaust in my '00. An '00 is mostly flanges.
Bought a bunch of stainless steel nuts, bolts, washers, etc for the job.
In a place or two the washer would not lay flat in the flange.
I just ground down the side so it would.

 

[jeepingben]

I tacked these in, but I am waiting to get new studs + a new donut gasket before reassembling.

I didn't mention yesterday, but there was a bunch of red grease with metal chips embedded inside the pipe. That is probably left over from bending/stretching but I wasn't excited about that junk blowing through my brand new cat.

As far as I know this is the only option for a mandrel-bent downpipe that fits the stock manifold. I gladly would pay a little more for them to address these issues and make this pipe a bolt-on.

 

[Muddy98]

How was fitment other then the flange issue and how have these been working out for you guys? I just put my order in on ebay. I know the walker is tried and true but having something that will last longer and get rid of the crushed pipe crinkles sounded like a good deal if it works out so i took the risk, figured if nothing else I could try for their "lifetime warranty" any issues so far?

 

[Alwayssideways]

How was fitment other then the flange issue and how have these been working out for you guys? I just put my order in on ebay. I know the walker is tried and true but having something that will last longer and get rid of the crushed pipe crinkles sounded like a good deal if it works out so i took the risk, figured if nothing else I could try for their "lifetime warranty" any issues so far?

I am also interested in the fitment other than the flange. I was going to make one of these since the market is lacking. But just over $100 for a mandrel bent pipe isnt bad considering the time it would take to make that piece. I would be interested to see how it clears the tranny. My current downpipe hits the oil pan.

 

[Rockwood]

Its very low stainless content itl weld fine with anything handy.

Lower grade stainless*.

That being said: 304SS will still rust exposed to salt. 409 will last nearly as long, just grow a layer of surface rust that's less attractive. Since most of us off-road our XJs, this will be covered by a layer of baked on mud anyway.