S&S® UNASSEMBLED 124” ENGINES FOR THE AHDRA 124 CHALLENGE CLASS

S&S 124 Challenge engines are designed specifically to compete in the 124 Challenge class of the AHDRA.

They are available in unassembled form and with natural finish only, since it is assumed that aesthetic and performance modifications will be performed to prepare them for the track. They are intended for the racer who wants to take full advantage of all the modifications allowed under the 124 Challenge class rules.

Engines are available with Super Stock® cylinder heads or with S&S Big Fin SA-B2 Special Application cylinder heads. Builders can also choose between standard style flywheels and the new “pork chopped” flywheels, which are considerable lighter for faster acceleration. 124 Challenge engines are available for 1984-’99 big twin chassis and for stock 1999-up big twin chassis. Engines do not include a fuel delivery system. Order Super D or VFI.

S&S 124 CHALLENGE ENGINES FOR 1984-’06 CHASSIS
Cylinder Head Style	Flywheel Style	For 1984-’99 Chassis		For 1999-’06 Chassis
Cylinder Head Style	Flywheel Style	Part No.	MSRP	Part No.	MSRP
S&S SA-B2 Big Fin	Standard	31-9744	Call	31-9684	Call
S&S SA-B2 Big Fin	Pork Chopped	31-9638	Call	31-9636	Call
Notes: Engines for 1984-’99 models come with cast tappet guides and gear cover. Engines for 1999-up models include the S&S oil pump and oil filter bracket.

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