looking for a Bolt on Y-pipe upgrade for a 96 vortec..

[Jrgunn5150]

That Walker pipe looks like a T pipe lol.

My 3/4 ton pipe necks down at the collector and pinches pretty far at the bends as well.

 

[GMRedline]

That Walker pipe looks like a T pipe lol.

My 3/4 ton pipe necks down at the collector and pinches pretty far at the bends as well.

I'm not a big fan of the crush bends but it was the cheapest way to get from the stock manifolds to a 3" outlet. It's still way better then the factory 1500 pipes. I should take a side by side pic comparing the two.

 

[Idaho4x4]

I put together my own 3" cat-back system using information from this thread. It's a really good thread if you haven't seen it.

http://www.gmt400.com/forum/showthr...Pipe-on-a-Vortec-3%94-SI-SO-Exhaust-for-Burbs

I haven't installed my stuff yet...

You must be registered for see images attach

I also added 3" Flowmaster High flow cat and Flowmaster Muffler.

You must be registered for see images attach

Technically, it all can be clamped together so there is no need for a shop. I have a welder so I'm going to weld most of mine and install some flanges so I can take it apart if I need to.

Do you remember what the inlet diameter of the y pipe was?

 

[GMRedline]

2.5" inlets. 3" outlet.

 

[95Escahoe]

Flowmaster makes a nice y-pipe setup for these trucks


Sent from my iPhone using Tapatalk

 

[Ironroad9C1]

Magnaflow Y pipe for the TBI trucks is great,fits 4.3 vortec but needs a post catO2 bung and for the vortec trucks upgrading to the bigger 3/4 and 1 ton down pipes is a good upgrade.

 

[Bondovw]

Use a y-pipe for a 3/4ton with a 350. They are bigger

Will they bolt on the factory 1/2 ton manifolds?

 

[Bondovw]

I just put tri y's on my 97, and have the manifolds and remnants of the y pipe on my work bench. A couple of pics to show just how restrictive they must be. Is the outlet on the factory manifold larger than the Y pipe?

You must be registered for see images attach

You must be registered for see images attach

The pipe has an ID of about 1 5/8". This is probably why there are limited performance increases with short tube headers bolted up to the stock y pipes.

 

[superdave]

The outlet is larger, but I don't know by how much. Those parts are long gone now. Probably the biggest issue on the stock y pipe is how much it gets pinched down in the bends.