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Old Oct 20, 2021 | 05:18 AM
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Default Exhaust Question
I'm going to be running dumps, with Dynomax 24215 bullets, off my collectors.

The collector is a 3'' and the bullets are 2.5''. What size reducer will I need?


https://www.ecklers.com/firebird-dou...-337511-1.html

https://www.summitracing.com/parts/wlk-24215
Last edited by RONIN LSX; Oct 20, 2021 at 10:23 AM.
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Old Oct 20, 2021 | 09:56 AM
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The Eckler link is a dead end. Won't some simple 3"- 2-1/2" slip-slip reducers do it? Just weld to the bullets....
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Old Oct 20, 2021 | 10:14 AM
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Originally Posted by RONIN LSX
I'm going to be running dumps, with Dynomax 24215 bullets, off my collectors.

The collector is a 3'' and the bullets are 2.5''. What size reducer will I need?


https://www.ecklers.com/firebird-dou...ails_tab-title

https://www.summitracing.com/parts/wlk-24215
are you doing this yourself? If not a good exhaust shop can do a step-down weld and there won't be an issue.
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Old Oct 20, 2021 | 10:20 AM
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Originally Posted by G Atsma
The Eckler link is a dead end. Won't some simple 3"- 2-1/2" slip-slip reducers do it? Just weld to the bullets....

I have the LTs in the link, I just posted the link as a reference to what I have. But yeah, that is what I was talking about, I wasn't sure the best way to go with the reducers and what size. Do I get a reducer that goes over the collector and bullet inlets or do I get a reducer that slips into the collector and bullet inlets?

EDIT: ****, I just realized what you said, lol... Link fixed.
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Old Oct 20, 2021 | 10:24 AM
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Originally Posted by 02*C5
are you doing this yourself? If not a good exhaust shop can do a step-down weld and there won't be an issue.

No, I'll be taking it to a shop
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Old Oct 20, 2021 | 10:43 AM
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Originally Posted by RONIN LSX
No, I'll be taking it to a shop
It will be a no-brainer for any competent muffler shop with a tube bender/expander. 20-minute job.
Just saw the Eckler post. Looks like reducers come with the headers. Use them. No-brainer....
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Old Oct 20, 2021 | 11:09 AM
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Originally Posted by G Atsma
It will be a no-brainer for any competent muffler shop with a tube bender/expander. 20-minute job.
Just saw the Eckler post. Looks like reducers come with the headers. Use them. No-brainer....
All the other parts are long gone, lol

I'm trying to mitigate the cost, with buying the reducers, because the shop will sell you a $10 reducer for $35.
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Old Oct 20, 2021 | 11:15 AM
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The shop can MAKE the reducer with the tubing expander by expanding one end of a couple short pieces of scrap 2-1/2" tubing. If they charge $70 for them, RUN, Forrest, RUN to a more competent muffler shop...
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Old Oct 20, 2021 | 12:21 PM
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Originally Posted by G Atsma
The shop can MAKE the reducer with the tubing expander by expanding one end of a couple short pieces of scrap 2-1/2" tubing. If they charge $70 for them, RUN, Forrest, RUN to a more competent muffler shop...
lol, yep! Just got off the phone with a shop and they want to charge $40 each for the reducers, lol...

I'm thinking about using a lap joint band clamp and just deal with the slight exhaust leak, lol
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Old Oct 20, 2021 | 01:10 PM
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Originally Posted by RONIN LSX
lol, yep! Just got off the phone with a shop and they want to charge $40 each for the reducers, lol...

I'm thinking about using a lap joint band clamp and just deal with the slight exhaust leak, lol
reducers are like 20 bucks. Just buy 3" mufflers and recoup costs on the 2.5s.
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Old Oct 20, 2021 | 01:14 PM
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Originally Posted by Bspeck82
reducers are like 20 bucks. Just buy 3" mufflers and recoup costs on the 2.5s.
I was literally thinking the same thing, lol
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Old Oct 20, 2021 | 01:18 PM
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There are dirt track mufflers with turndown built in on summit I think they were like 30 bucks. Beyea 10 or something like that.
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Old Oct 20, 2021 | 01:20 PM
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Originally Posted by Bspeck82
There are dirt track mufflers with turndown built in on summit I think they were like 30 bucks. Beyea 10 or something like that.
Thanks, I'll take a look for them
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