2006 Z06 Corvette

427 cid Aluminum C5R blueprinted block
512HP with advertised 500HP
Aluminum block w/104.8mm bores & pressed-in liners
Forged steel crankshaft with 101.6mm stroke
6-bolt forged steel main bearing caps
Titanium connecting rods
Cast Eutectic aluminum flat-top pistons
Racing-derived CNC-ported aluminum heads w/ 70cc chambers
56mm titanium intake valves
41mm sodium-filled exhaust valves
11.0:1 compression ratio
Composite manifold with 90mm single-bore throttle body
Camshaft with 15mm (.591-inch) lift
Dry-sump oiling system
7000rpm redline
Weight: 2900 lbs
Rear spoiler
Functional air induction from hood vent
Hydroformed aluminum chassis*
*The chassis was developed by Pratt and Miller, the engine by Katech. Since these two companies brought us the C5R, one might expect the Z06 platform to be a C5R with a license plate. That would be close.

The performance of this package will blow the doors off any comers, including the exotics.
Source: www.corvettels7.com

That is just unbelievable to get the 499rwhp with just those mods. That's 372.4rwkw, mind boggling.

Thanks for the great thread.