Proflow Cylinder Heads & Roller Rocker kit, AirMax 205 and Aluminium Roller Rockers
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. Perfect for your Mild or High performance Hot Rod.
SPECIFICATIONS |
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| Material | 356 Alloy, T6 |
| Chamber Volume | 68cc |
| Intake Runner Volume | 207cc |
| Intake Port location | Raised .100" over stock |
| Minimum Cross Section | 2.18 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 blended) Exhaust 1.650” (45 degree seat custom high velocity radius/blended) |
| 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


