Originally Posted by RJ MFG

Gentlemen, at this point all our customer supplied data outside of our shop car have multiple changes including lower compression. We will state that with the GTR manifold many customers are EXTREMELY happy with the performance! Two customer specifically have for the first time maxed out the Fast intentions Stage 2 Twin Turbo kit! Something no one had been able to do on the stock manifold. Neither customer lost power anywhere in their graphs. Power continued to climb all the way to redline. Two separate tuners and both making ~800whp on the Fast intentions Stage 2 kit!