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Old 03-01-2017, 10:34 PM   #1
Giuseppe
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Connecting down pipe and catback

Hello

Maybe this is a dumb question but I'm asking it anyway. I have a 3" cts down pipe that shrinks to 2.75", I believe, where it connects to my standard catback. I want to buy a catback that is 3". How do I connect the two? The reducer on the down pipe is one big piece. Do I cut the end off? Then find some way to connect the two with a long piece of pipe?

Thanks
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Old 03-01-2017, 10:39 PM   #2
DASVDUB
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There are companies that make reducer pipes.

Google this: 3 inch to 2.75 exhaust reducer

Anything from summit racing or somewhere like that works!
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Old 03-01-2017, 11:22 PM   #3
Giuseppe
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Hey sorry msybe I wasn't very clear. My current cts down pipe reduces to 2.75" which means I can't connect it to a cat back I want to buy that is 3". So how do I modify the 2.75" end of the down pipe to fit the 3" cat back? Do I cut off the 2.75" end? Just wondering how others have got around this issue.
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Old 03-01-2017, 11:38 PM   #4
DASVDUB
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Quote:
Originally Posted by Giuseppe View Post
Hey sorry msybe I wasn't very clear. My current cts down pipe reduces to 2.75" which means I can't connect it to a cat back I want to buy that is 3". So how do I modify the 2.75" end of the down pipe to fit the 3" cat back? Do I cut off the 2.75" end? Just wondering how others have got around this issue.
I don't know how else to explain this to you...

Use this when installing both said pieces.

https://www.summitracing.com/parts/wlk-41687/overview/

This eliminates having to hack anything off. Connect the 2.75" pipe to that side and the 3" to the other.
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Old 03-02-2017, 03:19 AM   #5
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Quote:
Originally Posted by Giuseppe View Post
Do I cut off the 2.75" end?
That is an option too....cut it off & then get a 3" section to mate them together for a full 3" turbo back system

OR use an adapter, like mentioned above
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Old 03-02-2017, 08:40 AM   #6
Giuseppe
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Quote:
Originally Posted by DASVDUB View Post
I don't know how else to explain this to you...

Use this when installing both said pieces.

https://www.summitracing.com/parts/wlk-41687/overview/

This eliminates having to hack anything off. Connect the 2.75" pipe to that side and the 3" to the other.
Ohhh ok. So you're saying leave the reduced pipe size in the exhaust run. I get it. I want to remove the reduction in size so it's 3" all the way. So I guess I'll cut the down pipe and then try to find a 3" pipe to connect the two.
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Old 03-02-2017, 10:26 AM   #7
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Quote:
Originally Posted by Giuseppe View Post
Ohhh ok. So you're saying leave the reduced pipe size in the exhaust run. I get it. I want to remove the reduction in size so it's 3" all the way. So I guess I'll cut the down pipe and then try to find a 3" pipe to connect the two.
Just go to an exhaust shop and get a custom 3in catback made.
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Old 03-02-2017, 04:10 PM   #8
oldtype2
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Connecting down pipe and catback

Does your downpipe look like this?



If so, the reduced end would be 60mm or 2 3/8" to use the stock sleeve clamp.

MagnaFlow and 42 Draft Designs both make 3" cat-backs that reduce to fit the stock 60mm sleeve clamp.



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