[BarneyMobile]

The factory compression ratio on an LQ9 was 10.0:1. With stock 241's you'd be just under 10.7:1 and with LS6 243's, you'd be at 11.0:1. The 243's will likely give a 10-20 hp bump with just the increase in flow over the 241's, and they'll raise compression so you may see even more power so if you can get them cheap, they're worth while. With a more restrictive exhaust, you'll likely lose a few ponies.