Hey guys finally she starts up and runs. Only thing left is to get her smogged.
I have been going back to stock for the smog test but have a few questions.

Car as of now has Pettit street port, Greddy sp exhaust, walboro fuel pump.

My situation now is that I recently got an Efini Ypipe and wanted to install that, how difficult of a process is installing it and if the process requires removing the stock down pipe should I go ahead and install the 3" aftermarket downpipe since I'm already unbolting down there?

Ultimately I want to pass smog, but I don't want to have to go through a process twice if I don't have too.

Can I pass CA smog with this down pipe or should I stay stock and deal with the extra labor.

Thanks!

 

it's very simple to get down to the Y pipe, no need to remove the down pipe.

remove all the airbox crap so you can get down to the Y pipe. also remove the rear turbo hard intake pipe (the one near the firewall) in oder to get the stock Y pipe sections off. i suggest removing the whole Y pipe (front and back pieces) when you install. makes it much easier to remove, then pop them apart, plug on the new Y pipe section, and put them back on together.

old lower y pipe section


y pipe removed


new lower section installed


i ended up modifying my efini ypipe, now it looks like this


internal splitter (yes, i am non-seq)


welded up nipple for stock bov hose


btw, i know someone is going to chime in and rant about how the splitter in the Y pipe doesnt do anything, but don't bother.

 

HA HA well I feel like an idiot I was thinking why does your Y pipe look different from mine and there is no way to getting the back bolts off with out going from the bottom. I didn't know it was two pieces.

I'm assuming there is no differnce from efini and us part that is circled?


Still it is a bit harder for me because I use the air pump still. Hopefully its possible to do without removing that. I really don't want to mess with belt tensions.

 

yes, the efini Y pipe kit really only replaces the section that bolts up to the front turbo & also the crossover pipe. you will still use the rear section of Y pipe.

stock (left) vs efini (right)


flipped over


since i was going non-seq with the turbos, i also welded up the rear section of Y pipe. over the summer we're going to fab our own Y pipe that will replace both the rear & front sections. i'll post a thread about it when we ever get that far...maybe other people who are non-seq might be interested...? here's how my y pipe ended up before we dropped the motor back in - kind of looks like crap with all the welds all over the pipes, but i'm sure they flow better now.

 

can the install be done without removing the circled section?? is there just some type of rubber gasket that makes a seal between the two pieces?

 

there is an O ring on the front section of Y pipe, that is what makes the seal between the pipes.

im sure it is possible to do the job without removing the rear section, but i wouldn't recommend it. if you have to force the two together than it may not seal properly

 

this is becoming a bigger pain in the @$$ then I thought. Is there any possible way of getting the y pipe out without removing the air Pump? If not How do I remove the AIr pump? the hose and fittings for air pump wrap around the top of the Y pipe. ANd unbolting the air pump does not give the belts enough slack to get the air pump lose.