So i want to run catless most of the time and be able to swap them in when its emissions time. Dont worry about the 5th and 6th ports, im putting that on a different system. I want to remove the acv and airpump. Can you still pass emissions with the cats in, and the airpump not connected?

 

No Air Pump renders your ACV useless which In turn renders your Split Air Pipe being useless which leads to a smoked out Cat.

Didn't you post the same question? Or was It somebody else? Deja Vu perhaps? I would do a search.

 

dosent the airpump turn off after 3000 rpm anyway?

i asked a similer Q, this is different. i asked if i could hook up the airpump directly too the cat before.

 

search for a post under my name titled guess what i passed e-check with..
Dave

 

[QUOTE]Originally posted by OC_
[B]dosent the airpump turn off after 3000 rpm anyway?

That Is the function of the ACV. Your Air Pump Is continuious but It the ACV that redirects the air at a given RPM.