STOCK Trickflow 225cc CNC Ported Aluminum Cylinder Head SBF 351C/M 400 72cc. This product data sheet is originally written in English. Trickflow PowerPort 225cc fully cnc ported cylinder head for 351C 351M/400 or Clevor Ford engine, TFS-5161T004-C11, with titanium retainers and springs for. 680 max lift big hydraulic roller or small solid roller camshafts. Trick Flow PowerPort® Cleveland 225 cylinder heads feature runners based on the OE Ford 2V design. The exhaust runners are raised. 100 from the stock location to improve the short turn radius and dramatically improve exhaust flow, and a revised oil return system improves oil drain back and includes provisions for mating with Ford 351W blocks. The heads feature fully CNC Competition Ported runners with a premium high resolution surface finish for maximum, all-out performance. PowerPort® Cleveland 225 heads fit Ford 351C, 351M, and 400 engines out of the box. With minor machining, the heads also fit Ford 302/351W blocks to create a “replica” Boss 302 or a 351 “Clevor” engine. The heads are available fully assembled or as bare castings. Trick Flow® PowerPort® Cleveland 225 Cylinder Heads for Ford 351C, 351M/400 and Clevor. Combustion Chamber Volume (cc). Intake Runner Volume (cc). Exhaust Runner Volume (cc). Intake Valve Diameter (in). Exhaust Valve Diameter (in). Maximum Valve Lift (in). Hydraulic or solid roller camshafts. Outside Diameter of Outer Spring (in). Number of Springs Per Valve. Valve Stem Seals Included. Rocker Arm Studs Included. Rocker Arm Nut Thread Size. Rocker Arm Nuts Included. Valve Cover Mounting Style. Accessory Bolt Holes Drilled. Valve Seat Machine Style. Exhaust port is raised 0.100 in. Over stock 2V head. We do not lower invoice values since it is a violation of US and International custom laws. Let us work to resolve your problem so everyone is happy. Suite D7 Costa Mesa, CA 92627. And no repairs will be provided, nor labor charges covered by TREperformance Inc. TREperformance 1725 Monrovia Ave.