Installed a Flowmaster AT kit on my car and welded the reducers...
American Thunder Install ??s
- Thread starter Dukes72
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Dukes72
Veteran Member
71cmro said:
My headers do have the flange and bolt ring. Take a look at the link in post number 4- the supplied reducer cone does not have any flange- it is straight. All of the exhaust work I have done has usually required a header collector reducer from the 3" header down to the 2.5" exhaust tube. This kit's "reducer cone" does not have a lip on the end like a reducer I am familiar with. I cant' imagine how the gasket and bolt ring would seal between Flowmaster's reducer cone and a normal header collector. I won't be able to get pics for a few hours.
Edit: I do have access to a mig welder, but it seems like but welding the joints on a kit that has a MSRP of $500 ish gets kind of rediculous. BTW- I didn't pay MSRP...
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Dukes72
Veteran Member
Red70Camaro said:Installed a Flowmaster AT kit on my car and welded the reducers...
I can see the 2.5" end of the reducer cone is welded to the h pipe extension in the pic, but I am having a tough time identifying what is on the other side of the bolt ring. It even looks like the 3" end of the reducer cone has been shortened. The joint between the header collector and the 3" end of the famous reducer cone is where I am lost.
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71cmro
Veteran Member
OK. Now we're getting somewhere. It looks like they sent you the wrong reducer. What brand of headers do you have?
This is what I used (they came with my headers, not the exhaust kit): http://store.summitracing.com/partd...part=SUM-G4754&N=700+-101825+115&autoview=sku
They should bolt together with a gasket inbetween... ? If they don't reach, place a section of 2.5" pipe between the h-pipe and the reducer...
Dukes72 said:
They should bolt together with a gasket inbetween... ? If they don't reach, place a section of 2.5" pipe between the h-pipe and the reducer...
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71cmro
Veteran Member
If your headers have a flange and 3 bolt ring then you MUST have a 3" reducer with a 3 bolt ring like the one shown in the link http://store.summitracing.com/partd...part=SUM-G4754&N=700+-101825+115&autoview=sku
You have non-flange reducer. Throw them out and buy a pair from summit that reduce down to 2 1/2" and weld it to the h-pipe or figure out a way to clamp it.
You have non-flange reducer. Throw them out and buy a pair from summit that reduce down to 2 1/2" and weld it to the h-pipe or figure out a way to clamp it.
Dukes72
Veteran Member
71cmro said:
This is exactly what I believed was required for my setup.
I wanted to make sure I wasn't crazy that the equipment I had wasn't going to go together in smooth fashion.
Anyone know what Flowmaster has in mind shipping this kit with the flangless reducer cone and a new 3 bolt ring with gasket? Obviously this doens't bolt up to a normal header collector with 3 bolt ring flange.
Thanks for everyone's help. I think my local Oreilly had the 2.5" reducer in stock from Flowtech.
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I have the exact same setup (American Thunder with Hooker Comps) and made things easy on myself. I picked up the Flowmaster ball and socket adapter and welded it onto the header. Worked out real nice and took some of the stress off the system since it allowed the pipes to swivel a little before I tightened them down. Good luck.
71cmro
Veteran Member
Aren't there headers out there that don't have a flange and are made to be welded solid to the rest of the exhaust system?
Dukes72
Veteran Member
I think so. I always thought those would work best for an open header setup.71cmro said:
