Cat Replacement Pipe

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08-22-2005, 10:57 PM

joker90p

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Thread Starter

Join Date: May 2005

Posts: 53

i just ordered a pipe to replace the main cat do i just bolt it up or is there some air pump thing that will keep the 5th and 6th ports from opening?

08-23-2005, 04:10 PM

horn4858

Senior Member

Join Date: Mar 2002

Location: forest city,n.c.

Posts: 441

there is a 3 way valve for garden hoses(found at walmart or other hardware stores) that i used there is a write up somewhere,

sorry that probaly didnt help alot though. but i like it.They are other ways though.

W/ solenoids. good luck.

08-23-2005, 05:14 PM

jdp3253

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Join Date: Mar 2004

Posts: 37

[quote name='joker90p' date='Aug 22 2005, 07:57 PM']i just ordered a pipe to replace the main cat do i just bolt it up or is there some air pump thing that will keep the 5th and 6th ports from opening?

[snapback]751165[/snapback]

[/quote]

Looks like you have a '90 model year (S5). S5s don't use back pressure to open the aux. ports, rather the stock air pump. So the pipe shouldn't affect the aux. ports.