I have an Efini Y-Pipe and no longer use the port/hose that comes out from the top of it. I think it used to go into the airbox I don't really remember anymore :P

Anyways I've been using 3/4" heater bypass caps to block them off. They're rubber so eventually break open resulting in boost leak. My question is, how do you block yours off?

TIA,

Kevin

 

I've seen a lot of people weld it up.

 

See if this is something you would want to do:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/my-modified-y-pipe-done-garfinkle-375981/

 

here's what we did to mine...not as pretty as Mahjik's link, but it works.

 

disregard post!

proved my own theory incorrect

 

Ugh I wish I had a welder! I know my way of a rubber cap is ghetto but it lasted quite long! maybe cause I didn't drive it that much :P

 

well, try this, find a coin, or a metal disk thats larger than the hole in the Y pipe and then put it inside the rubber cap, itll take a lot of the abuse off the rubber, allow it to last a lot longer.