Just the ticket for engine builders searching for every possible pony , Trick Flow Ultra 18 ^® 250 Cylinder Heads with 18 degree valves make serious horsepower — the kind of power that wins races and brings home championships . Right out of the box , these heads deliver higher airflow numbers than fully-prepped 23 degree heads .

Special features abound in Ultra 18 heads : 56cc CNC-profi led combustion chambers ; 2.150 "/ 1.600 " valves ; PAC Racing valve springs ; race-duty valvetrain components ; 250cc intake / 100cc exhaust CNC Competition Ported runners for gobs of airfl ow ; and much more .

Be sure to bring a comb with you to the track so you ’ ll look nice in winner ’ s circle photos !

Dyno Results Ultra 18 250

Test Engine : 13.35:1 compression 335 c . i . d . with Trick Flow Ultra 18 ^® 250 cylinder heads ( TFS-3181T001-C01 ), COMP cams solid roller camshaft ( 284 °/ 292 ° duration @ . 050 "; . 726 "/. 704 " lift ; 114 ° lobe separation ), Jesel 1.60 ratio shaft mount roller rocker arms , ported Bowtie intake manifold , Quick Fuel 4150 series carburetor , Dynotech headers with 1 ⁷ ⁄ 8 " to 2 " stepped primaries .

Airflow Results Ultra 18 250

Lift Value Intake Flow CFM Exhaust Flow CFM . 100 " 73 56 . 200 " 144 103 . 300 " 221 150 . 400 " 280 204 . 500 " 315 236 . 600 " 338 258 . 700 " 343 269

Tests conducted at 28 " of water ( pressure ). Bore size : 4.155 "; exhaust with 2 " pipe .

New heads are just one component of the horsepower recipe . To make it complete , you ’ re going to need some more ingredients .

Trick Flow by Cometic MLS Head Gaskets for 18 Degree Cylinder Heads

With three layers of stainless steel , these head gaskets are the best way to keep combustion where it belongs . They are ideal for high horsepower applications , providing better torque retention , less distortion , and better sealing than conventional or composite head gaskets .

Fabricated Aluminum Valve Covers

These good-looking , tall height ( 3 ⁷ ⁄ 8 " overall ) fabricated valve covers not only look great , but more importantly , they clear the shaft mount rocker system used on hi-po engines with 18 degree heads . They ’ re made from . 084 " thick aluminum to reduce engine weight and include the necessary fasteners to ensure a correct installation .

True Roller Timing Chain Set

Billet steel gears and a double roller timing chain combine to make this Trick Flow True Roller Timing Chain Set the strongest , most accurate available today . Furthermore , the crank sprocket features multiple keyways to allow the cam to be installed straight-up , retarded , or advanced .

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Some parts are not legal for use in California or other states with similar laws / regulations . Please check your state and / or local laws / regulations .