In an Alfa again!
Join Date: Jun 2012
Location: South Africa
De - Cat No emissions requirements
Hi Guys, can I safely de- cat a Phase 1 Twinspark Spider (1997) without running into engine management problems? In South Africa there are no emission requirements so the cat is not required by law. I would like to replace the current "bitsa" exhaust currently on the car with something a bit more free flowing. I guess that since the lambda sensor is upstream from the cat, it wouldn't really know if the cat was there or not.
What do you guys suggest. I was thinking of a 55 mm system but which boxes can be deleted without ill effects? I would like her to sound a bit more like an Alfa than currently. At the moment she has the "standard" three box system, but it is all aftermarket, done by a previous owner.
I don't have the luxury of buying a system off the shelf. It would have to be custom built by one of our local exhaust fitters.
If anyone has a tested formula, I would really like to hear from you regarding diameters and silencer boxes.