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Instruction Sheets for Part Number FMS-M-6049-X2
Ford Performance Parts 289/302/351W X2 Street Cruiser Aluminum Assembled Cylinder Heads M-6049-X2
Part Number: FMS-M-6049-X2
Ford Performance Parts 289/302/351W X2 Street Cruiser Aluminum Assembled Cylinder Heads
Cylinder Head, X2, Aluminum, Assembled, 64cc Chamber, 188cc Intake Runner, Ford, 289, 302, 351W, Each
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Estimated Ship Date from Nevada: Monday 10/26/2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
M-6049-X2
Part Type:
Product Line:
Summit Racing Part Number:
FMS-M-6049-X2
UPC:
756122008980
Combustion Chamber Volume (cc):
64
Intake Runner Volume (cc):
188cc
Exhaust Runner Volume (cc):
63cc
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast aluminum
Intake Port Shape:
Rectangular
Intake Valve Diameter (in.):
1.940 in.
CNC-Machined Combustion Chamber:
No
CNC-Machined Intake Runner:
No
CNC-Machined Exhaust Runner:
No
Intake Port Location:
Standard
Exhaust Port Shape:
Rectangular
Exhaust Port Location:
Standard
Intake Valves Included:
Yes
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.540 in.
Valve Springs Included:
Yes
Maximum Valve Lift (in.):
0.600 in.
Outside Diameter of Outer Spring (in.):
1.207 in.
Damper Spring Included:
No
Number of Springs Per Valve:
Single
Retainers Included:
Yes
Retainer Material:
Steel
Locks Included:
Yes
Lock Style:
10 degree
Valve Stem Seals Included:
Yes
Valve Stem Seal Style:
Positive stop
Rocker Arm Studs Included:
No
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
No
Valve Cover Mounting Style:
Perimeter bolt
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
20
Exhaust Valve Angle:
20
Valve Guides Included:
Yes
Valve Guide Material:
Bronze
Valve Seats Machined:
Yes
Valve Seat Machine Style:
3-angle
Valve Seat Material:
Steel
Cylinder Head Color:
Natural
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Heat Crossover:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Requires head bolt kit FMS-M-6065-D289 when installing heads on factory 289 or 302 block. Does not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief.
Ford Performance Parts 289/302/351W X2 Street Cruiser Aluminum Assembled Cylinder Heads
Ford Performance Parts 289/302/351W X2 Street Cruiser aluminum assembled cylinder heads provide an easy way to bolt-on significant horsepower to your Street Cruiser package! Manufactured using all-new Ford tooling, and constructed using 356-T6 aluminum, each cylinder head is cast, precision machined, and assembled with premium components. The X2 heads also feature high-temperature exhaust valve seats, bronze guides, common rocker bosses for strength, and increased section thickness in critical areas for porting. Sold individually, two of these X2 Street Cruiser cylinder heads are required for you to complete your engine's horsepower upgrade.
Additional features include:
* Intake flows approximately 230 cfm at .600 in. lift (at 28 in. of H20)
* Exhaust flows approximately 160 cfm at .600 in. lift (at 28 in. of H20)
* Machined for 1.94 in. intake and 1.54 in. exhaust valve diameters
* Use either GT-40 or aftermarket performance intake manifolds
* Must check your intake manifold for port match; not all intakes are compatible due to the tall high-flow ports
* Machined for AGSP-32C gasket seat spark plugs
* Each head weighs approximately 25 lbs. less than each production cast iron head
* Each head is leak-tested prior to assembly
* Compatible with many aftermarket intake manifolds, headers, and valve train components
* Includes Ford Performance intake valves, exhaust valves, and PAC 1219X Ovate Beehive valve springs
* Features 10 degree locks, steel valve spring retainers, and stock valve seals
* Features wider valve cover gasket sealing rail to prevent leaks
* Compatible with all Ford Performance roller camshafts and aftermarket hydraulic roller camshafts up to .600 in. lift
* Compatible with bolt-down rockers 1.6-1.7 ratio; always check rocker arm clearance to valve springs with production rocker arms
* Depending on lifter preload, Ford Performance rocker shim kits
* Use Fel-Pro exhaust gasket (part number 1415)
* Designed to be used on Ford Performance BOSS blocks; M-6010-BOSS302, M-6010-B302BB, M-6010-BOSS35195, M-6010-BOSS35192 and M-6010-BOSS351BB
* Use Ford Performance M-6065-BOSS headbolt set or Ford Performance M-6014-BOSS head stud kit
* Use Ford Performance head gasket M-6051-CP331 or M-6051-S331—or, for "Big Bore" application, use M-6051-R351
* Must use Ford Performance M-6065-D289 headbolt kit to install heads on 289/302 production blocks
* Does not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief
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