Yeah, but the Gen5 HS makes 11HP more than the Stillen header. And yes, I use to have a Stillen 4-1 header. Thomas Fox 93 NX2000 Qualudia101 at aol.com wrote: Don't know about Hot Shot Quality,however 2 yrs ago I opted for Stillen,because of the raised flange around the exhaust ports which allows good seating against the gasket.