Found this on the GTM site
The Stage 3 Kit continues where the Stage 2 Kit leaves off. Included with Stage 3 is the GTM Flash, as well as the complete GTM spec 2.5" cat back,Designed for N/A/Supercharged use but suitable for mild turbo charger applications. Features full stainless steel construction with a high polished finish.And Our GTM Supercharger Turn key kit .
it has a list price for the supercharger of $5390 may not be the same kit though
GTM Motorsports*::*PERFORMANCE UPGRADES*::*STAGED POWER PACKGES*::*GTM STAGE 3