SCREAMIN' PRO RACING PARTS EAGLE® - Harley-Davidson

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a. ScrEamIn’ EaglE ® Pro hurrIcanE cnc
oVal PorTED cylInDEr hEaDS*
engineered to maximize the track performance potential of
the Se120r race-engine, these Hurricane Cylinder Heads
are ready to complete your race Xtreme conversion. These
black-highlighted cylinder heads have been meticulously
CnC-machined for efficient air flow, and the machined raised
oval intake ports allow a straighter shot into the combustion
chamber. The heads feature large 2.175" intake and 1.635"
exhaust valves that are held in check with a set of Screamin’
eagle ® race Valve Springs with Titanium upper collars that
allow use of cams with up to .660" valve lift. All eFI models
require eCM calibration (priced separately). For race application
only.
17799-10 Black Highlighted. $1,599.95
Fits ’06-later Twin-Cam engines equipped with Oval Port
High-Flow Intake Manifold P/n 27082-10 or 27300035.
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B. ScrEamIn’ EaglE Pro maXImum VElocITy
arEa (mVa) cylInDEr hEaDS – cnc PorTED*
The most advanced Twin Cam performance cylinder head
design available. Screamin’ eagle CnC Ported Maximum
Velocity Area (MVA) cylinder heads create power across
the entire rPM range by maximizing velocity through the
intake ports. Increased air speed velocity through the ports
is achieved by “right sizing” port volume at 98cc, lowering
the port roof, and by precision-machining the shape of the
port to complement the giant 2.120" intake valves. Screamin’
eagle CnC-Ported MVA Cylinder Heads conquer a unique
engineering challenge, and provide the highest possible
torque and acceleration at any rPM. MVA Heads will boost
the punch of a 103" engine. When paired with high lift cams,
MVA Heads can give a 110" or 113" motor everything it needs
to achieve new levels of performance. Countless hours of
dyno testing resulted in a 95cc combustion chamber that
performs in perfect balance with the port size and shape,
and reduced detonation. MVA Heads feature Screamin’
eagle race Springs that permit the use of high lift cams (up
to .660"), and are machined to accept automatic compression
releases (sold separately) for easier starting. MVA Heads
are manufactured and assembled at Harley-Davidson’s
world class engine factory in Milwaukee, ensuring every set
is made to exact tolerances. All eFI Models require eCM calibration
(priced separately). For race applications only.
Fits ’99-later Twin Cam equipped models. ’99-’05 models
require separate purchase of (2) Intake Seal Flanges P/n
26993-06.
16925-11 Black Highlighted. $1,399.95
16934-11 Silver Highlighted. $1,399.95
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2.175" Intake Valves race Valve Springs
hurricane medallion
cnc-Shaped Passages
raised oval Intake Ports
a. ScrEamIn’ EaglE Pro hurrIcanE cnc oVal PorTED cylInDEr hEaDS – BlacK hIghlIghTED
larger Valves “right-Sized”combustion chamber
InTaKE PorT FloW aS a FuncTIon oF ValVE lIFT
Screamin’ Eagle cylinder head Type
hurricane
mVa
Lift (in.) SCFM SCFM
0 0 0
0.1 60 65
0.2 134 134
0.3 202 194
0.4 265 246
0.5 313 279
0.55 328 284
0.6 336 290
0.65 345 295
Tapered Valve guides cnc-Shaped Passages Free-Flowing Ports
noTIcE: Screamin’ Eagle adjustable or Perfect Fit Pushrods
are required for installation.
*nOTe: See matrix on page 75 for recommended cylinder
head/piston combination.
76 cylInDEr hEaDS
TWIn CAM MODeLS
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B. ScrEamIn’ EaglE Pro maXImum VElocITy arEa (mVa) cylInDEr hEaDS – cnc PorTED