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Ultima 113" Twin Cam A Competition Natural Replacement Engine Motor Harley 99-06

Manufacturer: Ultima

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PART # 298-451

Fits 1999-2006 Twin Cam A Models (Touring and Dyna)

Ultima 113” Silver Competition Series Engine for Twin Cam “A” Replacement

Our new 113” Twin Cam is a direct bolt in engine for 1999-2006 “A” motor Twin Cam bikes.

120 HP/120 Ft lbs of torque to the rear wheel.

Ultima is now offering a complete competition series hydraulic chain tensioner engine for Twin Cam.

Just like Ultima’s EVO style engines this engine features high quality components at an affordable price.

Cases are cast in a permanent mold from C356-T6 aluminum.

These cases utilize Timken sprocket shaft bearings.

The crankshaft assembly is the same crank assemblies Ultima has been building for years.

Dynamically balanced and featuring forged H-beam rods makes for a rock solid foundation for these engines.

Pistons are forged aluminum from Mahle Motorsports.

The heads feature conical valve springs, chromoly retainers, manganese bronze guides, compression releases and stainless steel valves.

Valve train components include an Andrews 67H set of cams.

Ultima’s 4140 steel adjustable pushrods and topped off with 4140 forged steel roller rockers.

The cam chest components include a billet oil pump, billet cam support plate with late model hydraulic chain tensioners for peace of mind.

Choices of finish include black, polished or silver.

With plenty of power these engines make a great replacement for a tired stock motor or a custom build.

113 C.i. Specs:

Displacement: cc/ci 1853/113
Bore: 4.000”
stroke: 4.500”
Compression: 10.0:1
Manual Compression Release Valves
Valve: Int 2.100”
Valve: Ex 1.70”
Cam lift intake: .570”
Cam lift exhaust: .570”
Pushrod 4140 adjustable steel
Piston: Forged Dome
Rod length 7.67”
Flywheel Forged 3 Piece
Rocker Boxes ‘93 Later EVO
Rocker Ratio 1.675
Billet Oil Pump
Late Model Hydraulic Chain Tensioners
High Quality Billet Cam support Plate

Ultima cases for Twin Cam utilize Timken sprocket shaft bearings, late model cam bearings and pinion bearing. Counterbored stainless allen head case bolts.
Close machining tolerances.
Made from prime C356-T6 aluminum that is superior in strength to A356 styling and cosmetic machining for a custom look.


Our state of the art designed crankshaft incorporates a massive 1.670 diameter pin that is pressed into the one piece, heat treated, 4140 steel flywheel half making these crankshafts some of the strongest available on the market today. Crank pins are installed with .008” press fit.
These crankshafts feature light weight 7.67” long H-Beam rods with 0.927 diameter wrist pins to handle all the power you can throw at them.
These are also balanced using our exclusive methods making these some of the smoothest engines in the industry.


C356 Casting. Cast-in liners will not move. All fins are machined for an excellent cosmetic appearance.

Cylinder Head

C356-T6 Casting. All fins are machined for excellent cosmetic appearance. 2.100 stainless Intake Valves. 1.700 stainless Exhaust Valves. Manganese Bronze guides. High silicon Wire Valve spring with Chromoly Retainer. Compression release valves.

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