catlytic converter removal

[tcossey33]

luckily where i live i dont have to pass smog and i wanna get that cat outta there......when i remove it can i just cap off the vent hose or do i have to do something else to it?

1987 gw 360

[porchpiggy]

Actually, you can remove the air pump, all the associated hoses, and put 9/16 bolts in the holes in your manifold, and completely desmog. Do a search on desmog and you should get some vacuum diagram stuff.

[Blackjack]

Porchpiggy,
Do you think there would be any significant gains in performance by removing all that crap or is it just to clean-up the engine compatment? I know removing the cat will relieve backpressure but the air pump?

[1BAD401]

One other thing you need to remove is the Cat heat shield, the muffler guys that I've dealt with will see that and say no way.

[tcossey33]

so will it affect the air pump if i just cap this line off or should i just leave it uncapped?