There ’ s no place for middle of the road at the track . That ’ s why Trick Flow developed GenX ^® 235 and 245 cylinder heads for GM LSX engines . Trick Flow engineers changed the valve angles to 13.5 ° to decrease valve shrouding , increase airflow , and improve rocker arm clearance . The spark plugs were relocated and material was added to increase high-RPM valvetrain stability and casting rigidity . A 6-bolt mounting pattern is available ( standard on GenX 245 ) for high compression , high boost applications , and titanium retainers come standard . Last , the heads are given Trick Flow ’ s top-of-the-line CNC Competition Ported runner treatment to deliver the large amounts of airfl ow your engine needs to make the massive power it takes to win races .

No thanks necessary ; we ’ ll see you in the winner ’ s circle .

Dyno Results GenX 235

Airflow Results GenX 235

Lift Value Intake Flow CFM Exhaust Flow CFM

Test Engine : 10.8:1 compression GM LSX 440 c . i . d . with Trick Flow GenX ^® 235 cathedral port cylinder heads ( TFS-3061T001-C03 ), Lunati custom hydraulic roller camshaft ( 262 °/ 270 ° duration @ . 050 "; . 629 "/. 629 " lift ; 114 ° lobe separation ), Jesel 1.7 ratio roller rocker arms , FAST 90mm intake manifold , Kooks headers with 2 " primaries , 3 ¹ ⁄ 2 " dual exhaust with Flowmaster mufflers .

. 600 " 340 245

Tests conducted at 28 " of water ( pressure ). Bore size : 4.125 "; exhaust with 1 ⁷ ⁄ 8 " pipe .

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

Cylinder Head Bolt Kits

Keep combustion where it belongs ! These high-quality cylinder head bolt kits provide consistent clamping force . The bolts are made from premium quality alloy steel with cold-formed heads and rolled threads . The kit contains all the bolts you need to install a pair of heads .

Track Max ^® Camshafts

Give your GM LSX an even bigger power boost with a Track Max camshaft . Available in several hydraulic roller designs up to 230 °/ 238 ° duration and . 625 "/. 625 " of lift , they are dyno proven to produce significant power increases over the entire RPM range .

Rocker Arm Trunnion Upgrade Kit for OE Rocker Arms

Trick Flow ’ s Rocker Arm Trunnion Upgrade Kit includes 16 stronger trunnions with circlip grooves that withstand high valve spring pressures and repeated high RPM blasts . Also included are 32 bearings with precision-made needles and improved retainer clips that eliminate the bearing walk-out problem that plagues the OE trunnion design .

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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 .