[Fraxum]

A question are ther 2 or 4 cats on the SS? I have read here and there both things that the second "cat" is a resonator. It does not look like one. But wierdly the o2 sensor is only after the first cat? If four cats how do the car know if the rear cats are functioning?

[oldman]

Originally Posted by Fraxum

Yes, I was thinking about that rear o2 spacer hack job. That did not work for me running LTs, but maybe with just a better cat.

Not sure if the gearing change on the CA6 hits the tune. If it does and the dealer doen't do it might as well go all in. I have heard of people buying a new computer the tune goes in (ECU?) to tune. But where exacly is the flash count saved?

I do see what you mean about the CA6 SS M6 gearing. It is exacly the Gen5 1LE gears but with a 3.73 final versus the 1LE 3.91. Say I have a 1LE 3.91 diff with good gears. I wonder if those will fit my SS?

Richmond says their 4.10 fits the 8.6" all years so I would assume it fits.

I'm lucky I figure I break it, time for a better one. Hopefully it ain't the engine.

[Nataphen]

Originally Posted by Fraxum

A question are ther 2 or 4 cats on the SS? I have read here and there both things that the second "cat" is a resonator. It does not look like one. But wierdly the o2 sensor is only after the first cat? If four cats how do the car know if the rear cats are functioning?

I don't know if the second ones are resonators or cats, but many cars have secondary unmonitored cats. So, I wouldn't doubt it if they were cats.