I just bought a Racing beat Cat replacement down pipe, i was wording what i have to do before the install. do i remove the air pump and block the air chack valve is there anything things else thats needs to be done?

 

S4?

 

S5 n/a

 

so is that all? just remove the air pump and block the air check valve?

 

I got the s4 set and all I did was hook the split air pipe up to the pipe coming off the presilencer. It said you need to remove all that stuff but it seems to work fine for me. My 5/6 ports are still actuating. I think yours should still work fine as well. just change the pipes and if the ports don't work afterwards you can always do what it says then.

 

if you have a s5 it runs off your air\smog pump so u can just leave that pipe hanging it only shoots air not suck it in..

 

Do NOT remove the air pump on the S5 unless you're ready for alot of rehashing!

dont ditch the air pump on the s5 unless you have a plan to activate the 6ports. S4 used exhaust backpressure to activate teh 6ports( and hence could remove the air pump without any issues), S5 uses the airpump to activate them. Non working 6ports is a loss of about 20ish HP.

 

None of the above. Install the cat replacement pipe and leave the air-pump and ACV in place. If you dump the air-pump, you'll loose more HP than you gain.

 

so i don,t need to remove anything?