The way I see it, there is a big resale market for these if it doesn't work out for you. When I tuned with the manifold, that was at 304whp and 243lbft/tq. When I installed my stock manifold and came back a week later, baseline was 302whp and 232lbft/tq. After tuning, I gained 4 more whp and tq. The gain was only after 7200 rpm. See below for final results and why I bought it again brand new. I plan on keeping it on with the superchargers too.
