Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

What size turndown?

Thread Tools
 
Search this Thread
 
Old 07-25-2013, 11:16 PM
  #1  
TECH Resident
Thread Starter
iTrader: (9)
 
slikrider20's Avatar
 
Join Date: Mar 2007
Location: Lincoln, Nebraska
Posts: 878
Likes: 0
Received 0 Likes on 0 Posts

Default What size turndown?

I've decided that when i get my headers on my car i'm just going to run a bullet style muffler (really leaning towards the Magnaflow 14419, or Moroso Spiralflow, help me decide) out of the Y pipe and dump it. Probably going with the BBK LT's and i believe their Y pipe is 2.5". I want everything to be a slip on fit, using only clamps and not welding.

I'm probably over thinking this, but what size muffler and turndown would i need with that Y pipe for it to be a slipfit? I'm just worried i'll buy the wrong size and then have to send it back and wait for another to ship back to me.
Old 07-26-2013, 01:35 PM
  #2  
TECH Senior Member
iTrader: (8)
 
Blackpanther99's Avatar
 
Join Date: Sep 2012
Location: Baytown, TX
Posts: 6,963
Received 4 Likes on 4 Posts

Default

Just get a 3" Y- Pipe that way you can get a 3" muffler with a 3" turndown.

Unless im overthinking now. Lol
Old 07-26-2013, 06:03 PM
  #3  
TECH Resident
Thread Starter
iTrader: (9)
 
slikrider20's Avatar
 
Join Date: Mar 2007
Location: Lincoln, Nebraska
Posts: 878
Likes: 0
Received 0 Likes on 0 Posts

Default

You wouldn't be able to slide a 3" pipe over another 3" pipe, no?
Old 07-26-2013, 07:56 PM
  #4  
It's not mine! woo hoo!
iTrader: (7)
 
demonspeed's Avatar
 
Join Date: Jun 2003
Location: Pittsburgh, PA
Posts: 7,128
Received 5 Likes on 5 Posts

Default

A 3" y-pipe like TSP or Speed Engineering will actually have a 2.75" outlet which is made to slide into the stock-size 2.75". To be honest, I'm guessing the BBK Y-pipe is going to be the same.
Old 07-27-2013, 02:12 PM
  #5  
TECH Fanatic
 
2000PewterT/A's Avatar
 
Join Date: Jul 2011
Posts: 1,074
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by demonspeed
A 3" y-pipe like TSP or Speed Engineering will actually have a 2.75" outlet which is made to slide into the stock-size 2.75". To be honest, I'm guessing the BBK Y-pipe is going to be the same.
^^^ This
Old 07-27-2013, 04:43 PM
  #6  
TECH Resident
Thread Starter
iTrader: (9)
 
slikrider20's Avatar
 
Join Date: Mar 2007
Location: Lincoln, Nebraska
Posts: 878
Likes: 0
Received 0 Likes on 0 Posts

Default

So basically i'd be fine with buying a 3" turndown and a 3" cutout?
Old 07-27-2013, 06:11 PM
  #7  
It's not mine! woo hoo!
iTrader: (7)
 
demonspeed's Avatar
 
Join Date: Jun 2003
Location: Pittsburgh, PA
Posts: 7,128
Received 5 Likes on 5 Posts

Default

Where did cutout come from in this conversation? lol If you're looking to run a bullet with a turndown after the Y, a cutout won't be necessary.

As for size, you'd need to cut the slip-in portion of the y-pipe to get rid of the 2.75" so that you can be sure to slide it into the 3" inlet of the bullet. You'll need to get a reducer (Walker/Dynomax makes them) if you want to run that setup.
Old 07-27-2013, 07:35 PM
  #8  
TECH Resident
Thread Starter
iTrader: (9)
 
slikrider20's Avatar
 
Join Date: Mar 2007
Location: Lincoln, Nebraska
Posts: 878
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by demonspeed
Where did cutout come from in this conversation? lol If you're looking to run a bullet with a turndown after the Y, a cutout won't be necessary.

As for size, you'd need to cut the slip-in portion of the y-pipe to get rid of the 2.75" so that you can be sure to slide it into the 3" inlet of the bullet. You'll need to get a reducer (Walker/Dynomax makes them) if you want to run that setup.
Sorry not sure why i said cutout, meant muffler.



Quick Reply: What size turndown?



All times are GMT -5. The time now is 10:32 PM.