Ford SB 289 302 351 Windsor 1.6 7/16" Stainless Steel Roller Rocker Arm Set Speedmasterª EFI systems give you

Speedmasterª EFI systems give you everything you need to add powerful and efficient fuel injection to your vehicle

and have TIG-welded seams

allowing it to run cooler and quieter than external units

They feature aluminum construction

This Speedmaster 300M steel crank gear

Ford SB 289 302 351 Windsor 1.6 7/16" Stainless Steel Roller Rocker Arm Set Speedmasterª EFI systems give youSpeedmaster Stainless steel rollers are manufactured from heat treated stainless steel and alloy steel tip rollers. Speedmaster roller rockers are available in various ratios, so you are good to go. They feature greater strength and durability, capable of withstanding valve spring load up to 600lbs.