My friend has an 86' n/a and a few days ago we gutted his cats. My question is do we now have to wire the 5th and 6th ports open? Thanks. Also he has no mufflers b/c they fell off. Would that make a difference?

 

Bump^

 

Geez I bet that car has gotta be loud as hell My T2 h as a gutted main cat and a small exhaust leak and it's loud as hell.

 

Its extremely loud at this point, Someone has to know the answer to this q.

 

If you fix the leak and replaced the gutted cat with some pipe of the same diameter as the rest of the exhaust, no more loudness!

I have an '89 Turbo II and it has custom piping from the turbo to a custom Y-pipe...all stock exhaust diameter for the Turbo II. (Stock mufflers still too)

THe tone is real nice!
Edit: the exhaust leaks make it SOOO LOUD!!!

You only need to wire the 5th and 6th ports open if you have removed your Air Pump or disconnected the 5th or 6th port actuators (from my knowledge)...I am more of a turbo guy...

 

I have recently gutted my cat (well, it actually 'gutted' itself) and have not done anything to the 5-6 ports. Still feels the same except for a bit more power. It is stinkier than it was.

 

if its an s5 (89-91) no as long as u still have the air pump
if its an s4 (86-88) then u do



shawn

 

bump^

 

Im thinking of gutting my pre cats, is it gonna be loud?

 

I wouldnt know b/c at this point there is some leaks and i gutted both the precats and the main cat.

 

When you mess with your cats your whole exhaust system is going to sound like a big *** leak basically you could have the nicest looking car with gutted cats and it could sound as bad as a beater going 5 mph down the road cause thats all it can do...instead of going the cheap route get a racepipe from bonez for under 100 bucks or so and your car will sound a hell of a lot better

 

I already do have a race pipe from bonez for 170bucks and the cars is amazingly loud. The power gains were awesome but I need to get rid of it for the time being to get my brakes on the car. I need to put my old set up on and cant figure out if I should gut the pre cats

 

eh precats make just as much noise as the main cat so it all depends on how much noise you want

 

just get a 3" high flow cat thats what im running. My exhuast it3" off the turbo to a Y splitter then 2 1/2" to the back. Does any one have a picture of a stock muffler i was told my car is running the stock ones and are they offset striaght though

 

gutting cat won't be too loud I've got no cats + full exaust and it's only loud when I want it to be