New MLS Cylinder Head Gasket Set (18mm) w/RTV Silicone for 03-10 Ford 6.0L PowerStroke Diesel Turbo F-250 F-350 F-450 F-550 E350 E450 Super Duty New Aftermarket OE Replacement : Meets or exceeds OE standard quality and performance requirements. Fits : 2003-10 FORD 6.0L (363cid) OHV V8 POWER STROKE DIESEL TURBO (w/ 18mm Cylinder Head Dowels) Package Includes : 1 MLS Cylinder Head Gasket Set (18mm), 1 RTV Gasket Silicone Note : This Set will NOT fit 20mm cylinder head dowels. CONFIRM THIS PART FITS YOUR VEHICLE BEFORE PURCHASING (Check Fitment Data Above)