plkgolfer

I recently just purchased a 2006 Mustang GT with a Saleen supercharger/intercooler. The other day on the highway I opened it up and whenever I would top out the 4th gear it had a feeling of sputtering/sluggish. I used 91 octane fuel and used octane booster (but it was a cheaper version that I picked up at the gas station). Any thoughts?

427Roush

Why use octane boost if not tuned for higher fuel grade or race fuel?
Check the fuel filter then check the tune.

plkgolfer

Will do. Appreciate it.