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I posted already but, I picked up a set of custom Doug Thorley headers off one of the aztek pace cars and was wondering about a couple things and people's opinions.
1. The crossover, it's 2.5in should flow plenty enough with the supercharger. I think the fit around the engine is fine since the aztek was a 3400, but not sure about the exhaust tunnel going down on my car. May or may not fit, guess a test fit will only tell.
2. Front header design? Good or bad? primaries are obviously shorter.
3. Rear headers. They have three small holes right after the flange on each primary. Two are plugged but one is still open....what's with that?
4. O2 sensors, The front one is just on the rear bank probably a good 12" before the rear and crossover merge. I know its not a problem on S&S headers with tuning, but is closer to the merge point, should I plug and weld a new one farther down?
5. The downpipe (obviously has to be modified, I think the ange is right, but on the alero it is straight back for awhile, not curved like this one) merges from 2.5 into a 3" pipe. Should be fine for my supercharged setup, just might hurt a little before the charger is on.
6. The headers themselves don't seem to be coated, but more likely a well worn stainless perhaps? How do I tell?
That's pretty much it, any other insights or opinions are welcome!
Thanks, Kyle
1. The crossover, it's 2.5in should flow plenty enough with the supercharger. I think the fit around the engine is fine since the aztek was a 3400, but not sure about the exhaust tunnel going down on my car. May or may not fit, guess a test fit will only tell.
2. Front header design? Good or bad? primaries are obviously shorter.
3. Rear headers. They have three small holes right after the flange on each primary. Two are plugged but one is still open....what's with that?
4. O2 sensors, The front one is just on the rear bank probably a good 12" before the rear and crossover merge. I know its not a problem on S&S headers with tuning, but is closer to the merge point, should I plug and weld a new one farther down?
5. The downpipe (obviously has to be modified, I think the ange is right, but on the alero it is straight back for awhile, not curved like this one) merges from 2.5 into a 3" pipe. Should be fine for my supercharged setup, just might hurt a little before the charger is on.
6. The headers themselves don't seem to be coated, but more likely a well worn stainless perhaps? How do I tell?
That's pretty much it, any other insights or opinions are welcome!
Thanks, Kyle
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