Just got my 4L80 installed and the magnaflow y pipe doesnt fit. I kinda have an idea of what i am going to do but was just curious what other peoples exhaust with the 80e turned out.
4L80 and Y pipe/exhaust pics
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I have American Racing long tubes, but with stock manifolds, shortys, or long tubes you still have a Y pipe that crosses underneath the trans tailhousing. With the 80e its longer, which is why you need a different crossmember. So with everything in place the crossmember is now where the Y pipe use to be.
Ok. When you said Magnaflow y pipe I assumed you were talking about the stock y pipe that came with the truck. That thing is waaay bigger than than the y pipe that comes with after market headers. I would say your gonna have to do some custom pipe work to make it work. I don’t have a 4L80 so I should prob shut up. Lol. Just trying to help. I’m sure someone will chime in with the answer.
2008 TBSS Super Charged
2008 TBSS Super Charged
I agree with Mike, since the 80 wasn't factory you're probably going to need some custom piping done. I'm not sure though
I understand its going to be custom. I was askin for pics of other peoples “custom” y pipes.
4l80 awd y pipe w/custom twin cats
I started with full tube headers with non cat y pipe, but in washington state I still needed cats. I chopped the y pipe and inserted two cats just behind the crossmember then installed a y and a new flex pipe altered the pin for the rubber mount and connected back to the stock two bolt flange. After splintering a hardened output shaft in the beefed up 4l70 I swapped in a 4l80, thankfully I did not need any mods to my modified y pipe when I installed the 07 4l80 (all the latest updates) and a transfercase from a 99 full size truck/suburban with push button shift and awd option. I have a pic but can not get it to load
I started with full tube headers with non cat y pipe, but in washington state I still needed cats. I chopped the y pipe and inserted two cats just behind the crossmember then installed a y and a new flex pipe altered the pin for the rubber mount and connected back to the stock two bolt flange. After splintering a hardened output shaft in the beefed up 4l70 I swapped in a 4l80, thankfully I did not need any mods to my modified y pipe when I installed the 07 4l80 (all the latest updates) and a transfercase from a 99 full size truck/suburban with push button shift and awd option. I have a pic but can not get it to load
So do you now have selectable 2wd <>4wd now with a 4l80? Time to go junk yard shopping if so.
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