We at MC Performance can handle or your upgrades as we are specialized in the GTR. we are also dealers for all the leading GTR aftermarket parts suppliers such as, HKS, AMS, DODSON, COBB, and Boost Logic. we have built and tuned many GTRs with different power levels from bolt on to vehicles making 1,000+hp. please feel free to contact us on your needs and we will be more than happy to assist you with your needs.