RPM 427, Take another look at that advertisement. See the last sentence. "Sold Individually" 629x2=1258
For a minute there, I thought I was going to have to upgrade! 629 for a pair would be a steal.
Tireburner, I have everything you've mentioned and then some. I've dyno-tuned this thing and I know what it is and isn't capable of. Also, I've been to the track and 103.5 MPH traps don't equal 320hp. Don't get sucked into the idea that these are the greatest budget-heads on the market. If anything, I would consider them slightly better than ported-stock. However, better than stock is better than stock. You get what you pay for and believe me, the manufacturers know what they can get out of them.
Horsemen, thanks for the weight info. I was just assuming they gutted their rides. Still, I'd like to get my car down to 3100 pounds.