Let'* not turn this in to another no-cat arguement...

This is very poor advice. Imagine how the recipient of your advice will feel when they get hit with the fine. Some of the quickest cars on this site still run with cats. It'* the legal and responsible thing to do.

I found the cats for the 3.8s. Just have to measure the exaust to see if i'm 2.25 or 2.5. I just hope this flows good enough so nothing in the engine gets stressed. One more question. I won't be running a DHP for a while. How do stock PCMs react with rockers?

you will not benefit from the higher shift points

x2

Stock PCM'* react fine to rockers. You won't get an SES light or anything like that, its nothing to worry about, but when you get a DHP you will see a nice gain.

When my dad dynoed his GTP with rockers, the powerband didn't start falling off until ~6200rpms or so. Shifting at 6k instead of the stock 5500 or 5800 rpm shifts (can't remember what they are for his car) will make a big improvement actually. Shifting at 6200 should help a little as well. Any higher than that and it probably doesn't do much. My dad shifted his GTP at 6200 with his rockers and had a 6600rpm limiter and since he set all the stock cam/M90 L67 1/4 mile and dyno records, I'd say it probably worked ok. Although we never turned it that high on the dyno with the rockers, on the street it seemed to pull pretty hard all the way to the 6600rpm limiter with the rockers. Keep in mind however that this was done with 85lb. valvesprings and OR pushrods and should not be attemped with stock springs and/or pushrods.

Shawn

The shift points for my car are 5800 1st-2nd and 5400 2nd-3rd. When I do get the DHP i'll have it shift at 6K through all gears. I'd go higher but i'm sticking with the stock springs and pushrods.

The 6k shifts should work great and you'll definately see a nice gain as I said before. We have a completely stock valvetrain in the SSEi (besides the rockers) and it shifts at 5950 with no problems at all (even with 160k+ miles on ti) and it pulls hard to the shift too. 6k shift points work very well with rocker'd cars.

Shawn