S&S CYCLE P93 Series Engine 106-0821

If you're building a custom Harley-Davidson with 1970–1999 alternator-style chassis, the S&S P93 delivers authentic panhead aesthetics paired with modern engineering that actually runs hard. This 93-cubic-inch engine combines retro styling from the golden era with 21st-century reliability, eliminating the false choice between looks and performance. You get a bolt-together solution engineered by S&S—no compromises, no reproduction shortcuts.

The P93 features a hydraulic valve train with roller rocker arms, S&S Super Stock ignition with billet timer, and a purpose-built camshaft that translates displacement into usable power. Everything bolts to 1970-up primary and transmission configurations, while the 66–84 exhaust and intake compatibility keeps your build options open. Backed by S&S engineering and a two-year warranty, this engine is built to perform on the street or strip.

• 93 cubic inches displacement
• 8.5:1 compression ratio
• 4.5-inch stroke
• 3.625-inch bore
• S&S roller rocker arms
• Hydraulic valve train
• S&S 585 camshaft
• Cast S&S pistons
• Super Stock ignition system
• Billet timer included
• Silver powder-coated cylinders
• Natural finish crankcases
• 66–84 exhaust compatible
• 66–84 intake ports
• Oil filter at generator location
• Two-year manufacturer warranty
• 1970–1999 Harley alternator chassis