Supercharger kit from ProParts/Tripoint
This kit has been in development for quite some time; I thought it had been for sale already but this is the first time I’ve seen the website advertising it. I really need something like this; a few months ago I moved from near sea-level in California to 8500 feet elevation in Colorado, and the power loss has been noticeable. Not to mention all the hills around here where I could use a little boost. Cost is $4500 for 2005 model years, $4750 for 2006 models (the drive by wire in those models necessitates the difference). This gets you a 50hp boost of power. For another $1k you can get the ECU reflashed with a lower cam changeover (5750rpm) and disabling of the learning feature.