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If you were hoping for a vast array of mods, you might be disappointed. There are certainly more manufacturers of after-market parts for your Firebird than you will find for your Aurora. Read through this board for some tips on air-box mods and possible exhaust mods. I would be hesitant of chip mods since the Aurora is a bit more complex than a pushrod LS-1, and also most modern cars are pretty well tuned. Car and Driver did a very complete testing of aftermarket chips a year or so ago, and they found the biggest improvements were in transmission mods because the firmer shifts can speed the car up. For the most part, engine programming just made the car drive worse (knock and vulnerability to hot days), with very little effect on performance. You might not want your luxo Aurora chirping the 1-2 upshift, though... or maybe you do...
Here are some resources to check out that have been posted before:
You might find more info about mods to the caddy. Many of these will apply in some way as the Aurora V-8 is a Northstar with a narrower bore.
Here is a direct link if anybody is interested in the pictures.
How does it look compared to the stock 95??
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