The 370ci LS out of a '01 Denali is controlled by an Acceleronics VersaFueler injector driver box and a custom dyno tune. The motor drinks E85 through two separate, parallel feeder lines; the second is boost referenced at 4 psi. The turbo setup is completely garage-built and uses a Master Power GT45 turbo, a Turbosmart 48 wastegate, and a TiAL's 50mm blow-off valve. All flow into a custom 3.5-inch downpipe and exhaust with a 6-inch MagnaFlow muffler. Nate uses two LS4 exhaust manifolds flipped forward to direct air into the turbo inlet.