Proflow Cylinder Heads & Roller Rocker Kit, SuperMax 225, SB Ford 302, 351C

Proflow does not sacrifice quality for a low price--you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of Engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302,351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB, phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, High Performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates. Perfect for your Mild or High performance Hot Rod.

Material:                                         356 Alloy, T6 

Chamber Volume:                           72cc

Complete Assembly options available in all chamber sizes

Intake Runner Volume:                  231CC

Intake Port location                        raised .125” 3V design 

Minimum Cross Section:               2.53 square inches MCSA 

Exhaust Runner Volume:             125cc - high velocity

Exhaust Port Location                 Raised .080” (near stock location) 

Valve sizes                                  Intake 2.10” (45 degree seat, custom 5 angles)

                                                     Exhaust 1.650” (45 degree seat ) 

Valve Guide Angles:                   Canted Valve angles

                                                    Intake 10 x 4 degrees

                                                    Exhaust: 9.5 x 3.0 degrees 

Valve Guides:                             Manganese Bronze .502” x 11/32” stems  

Valve Seat Inserts:                     Intake: 2.250” x 1.880 x 3/8 (Durabond 7000)

                                                    Exhaust: 1.680” x 1.430” x 3/8 

Spark Plugs:                               relocated for efficient fast burn, ¾ reach, 5/8 hex, washer seat (NGKBCP7ES) 

Spring Pads:                              1.570” od/.560” id 

Valve Spring Height:                  1.960” (with stock length valve) 

Pushrods                                    5/16” or 3/8” (check required length)

Rocker Arm Studs                      7/16” unc

Ext Water Port                             Heads have 3/4 npt tapped hole on each end which need to be plugged if not used

Head Bolts                                  Accept oem length bolts or studs 

Proflow's Pro Series 2024  Roller Rocker Arms are designed for use in street/strip and track applications. This series of 2024 extruded billet aluminum, CNC-machined rockers are precision-finished with friction-reducing ground needle and cage bearings for superior performance and quiet operation. They're available for a wide array of engine applications, These Pro Series rocker arms are precision-engineered to withstand rigorous racing conditions. Order the set designed to fit your engine application.

• Proflow Large Body Rockers increase engine power, enhance valve train stability & improve oiling
• New extrusion based on improvements developed through FEA analysis, resulting in an even stronger, stiffer body without compromising mass
• Contoured top give the rockers the best strength to weight ratio possible
• Spiral lock type clips replace retaining Circlips