S&S® P-SERIES ENGINES FOR 1948-'99 BIG TWIN CHASSIS  

Vintage Vibe . . . Modern Muscle

In the fall of 2007, S&S introduced an engine with a retro look, but with updated technology.  

The panhead engine has been hailed as the coolest looking classic engine of all time, and the Flathead Power™ P-Series engines from S&S capture that retro styling from the 50's and 60's, but with 21st century engineering.  Keep in mind that as cool as these motors look, they are not reproductions. These engines were built to run!  

 P-series engines are available in four styles to fit 1948-'99 style chassis.  One engine style is designed for 1954-'64 style tin primary applications.   These 1955-'64 style P-series engines can also be installed in 1948-'54 chassis if a 1955-'64 style inner tin primary cover is used.   Another engine fits 1965-'69 style chassis using the early alloy primary.  Finally, for retro custom applications, alternator and alternator/generator versions are offered that will fit any stock or custom 1970-'99 style chassis. 

 Match your performance needs with a choice of displacements and compression ratios: 93", 93" high compression, or the big and bad 103" model.   The P93H and P103 engines come standard with dual plugged heads.  While P93 and P93H engines will nearly always fit in stock chassis, P103 engines are 300" taller than stock and will not fit in stock frames without modification.

 Performance And Reliability

Although the S&S P-Series engines have a high classic cool factor, they are primarily designed to deliver performance and reliability. 

 Is this the engine you'd want for a 100 point show grade restoration? Probably not. But how about a show grade retro custom? Absolutely! A daily rider?  Of course!  

 There are many advantages to using readily available modern parts Performance improvements aside, the ability to obtain high quality replacement parts is high on the list!  A gratifying burst of speed from a big inch engine, and a quiet valve train are great, but being able to repair your bike without having to scrounge for obsolete parts makes it even better.   

The easy availability of replacement parts could make the difference between leaving your bike in the garage and riding it every day.   Like we said, these engines were built to run!

S&S P-Series Engine

Retro styling with modern technology

Heads - New design based on S&S  heads for shovels

Uses S&S roller rockers for shovel engines 1 500 ratio

Uses readily available S&S cylinders for shovels

S&S hydraulic valve train

S&S Super Stock® ignition and billet timer

93", 93" high compression, and 103" displacements

1955-'64, 1965-'69, and custom alternator & alternator/generator styles

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