ENGINES 9-2 FUEL SYSTEMS 9-6 TOP END 9-20 ... - S&S Cycle

Parts forTwin Cam 88®Parts forEvolution®S&S ® Special Application B2 Big Fin Cylinder HeadKit for 124" EnginesThe S&S Special Application (SA) Big Fin B2 Racing Cylinder Head Kits willmake your S&S 124" V124 or T124 engine more competitive at the drag strip.Kits are available for carbureted engines and for engines equipped with S&SVariable Fuel Injection (VFI).Parts forSportster® '86-'06VintageEnginesX-Wedge®Parts for Victory®,Off-road & MetricReplacementPartsTools &Shop SuppliesRacingProductsDealer Services& Promo ItemsWarranty &Company PolicyFeatures and Benefits❚❚ High flowing S&S SA big fin B2 cylinder heads are intended forapplications where top end horsepower is the most important❚❚ Superior cooling which is so important for big inch highperformance engines❚❚ These heads are a 41⁄8" bore version of the heads used on thelegendary Tribute 145 engines❚❚ Assembled with the 2.220" intake valves, 1.800" exhaust valves,and S&S .660" lift valve springs with titanium top collars❚❚ .200" taller than stock which makes it necessary to use speciallength pushrods❚❚ Intake and exhaust ports are "cast-to-shape" versions of the CNCmachined ports used in the Tribute heads – offering the sameflow characteristics without the high price❚❚Exhaust port adapters and flanges are included – easily fabricatea custom exhaust system❚❚ Heads are machined to accept S&S compression releases as wellas all required temperature sensors and vent fittings❚❚ Special piston with a dome shape that compliments the shape ofthe combustion chamber enhance flow and combustion chamberturbulence for better flame travel and more efficient combustion.This piston and head combination yields a compression ratio of12:1 when installed in an S&S 124" engine. Pistons of the correctoversize must be purchased separately (see chart).❚❚ Cylinder heads have highlighted fins and are available in naturalaluminum finish only.S&S®Special Application Big Fin Cylinder Head KitsFor S&S 124" EnginesEngine Type Carbureted VFI 1996-'01 StyleS&S 124" for 1984-'99 Big Twin 90-1122 90-1123S&S 124" for 1999-'06 Big Twin 90-1124 –OversizePiston Selection Chart - S&S® 124" Engineswith S&S SA Big Fin Cylinder HeadsPiston KitPart No.Piston RingPart No.*41⁄8" Std. 92-1580 94-1400X+.010" 92-1581 94-1401X+.020" 92-1582 94-1402XCarbureted Big Fin Head KitKit Contents for Carbureted Engines❚❚ Set of S&S big fin cylinder heads❚❚ Special length pushrods❚❚ Super D manifold❚❚ All required gaskets, flanges and sealsSuper D carb is not included. Pistons must be purchased separately.Kit Contents for VFI Engines❚❚ Set of S&S big fin cylinder heads❚❚ Special length pushrods❚❚ VFI throttle body with dual 21⁄16" throttle bores with throttleposition sensor, idle air motor, and high capacity fuel injectors*❚❚ High flowing VFI manifold assembly❚❚ High flowing VFI air cleaner❚❚ All required gaskets, flanges and sealsS&S VFI module is not included. Pistons must be purchased separately.* The same type of injectors used in the Tribute 145 engines.Note:Fitment on Harley-Davidson® Softail® models requires frame and rocker box modification.Order toll free 866-244-26739-26