Some parts are not legal for sale or use in California or other states with similar laws/regulations—see pg. 2 for details. WARNING: For Proposition 65 information, see pg. 2 Dyno Results GenX 235 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, 31⁄2" dual exhaust with Flowmaster muffl ers. Specifi cations Material: A356-T61 aluminum Combustion Chamber Volume: C00: 58cc CNC-profi led C01: 64cc CNC-profi led C02: 65cc CNC-profi led C03/C04: 70cc CNC-profi led Intake Port Volume: C00: 205cc CNC Competition Ported C01: 215cc CNC Competition Ported C02: 225cc CNC Competition Ported C03: 235cc CNC Competition Ported C04: 245cc CNC Competition Ported Intake Port Location: Stock Intake Port Dimensions: 3.250" x 1.070" cathedral Intake Gaskets: Cathedral OEM GM O-ring style Intake Valve Diameter: C00: 2.000" (TFS-30500211) C01: 2.040" (TFS-30600211) C02: 2.055" (TFS-30600210) C03: 2.080" (TFS-30600209) C04: 2.100" (TFS-30600208) Intake Valve Seat: C00: Ductile iron (TFS-30300271) C01/C02/C03/C04: Ductile iron interlock (TFS-51600271) Exhaust Port Volume: 80cc CNC Competition Ported Exhaust Port Location: Stock Exhaust Port Dimensions: 1.460" x 1.670" oval Exhaust Gaskets: GM 12617944 Exhaust Valve Diameter: C00/C01/C02: 1.575" (TFS-30600212) C03/C04: 1.600" (TFS-30600213) Exhaust Valve Seat: C00: Ductile iron (TFS-30600272) C01/C02/C03/C04: Ductile iron interlock (TFS-30600274) Valve Angles: 13.5° Valve Guide Material: Trick-Alloy powdered metal (TFS-30600252-1) C01/C02/C03/C04: Bronze alloy (TFS-30600251) Valve Seals: Viton® fl uoroelastomer canister (TFS-30600455) Valve Seat Angles: 45° x multi-angle Valve Spring Pocket Diameter: 1.480" Valve Spring I.D. Locators: 1.300" (C00: TFS-21400443; C01/C02/C03/C04: TFS-21400442) Valve Spring Retainers: 7° x 1.300" o.d. chromoly steel (TFS-21400410) 7° x 1.300" o.d. titanium (TFS-214T0415) Valve Stem Locks: 7° steel with bead lock (TFS-30600444) Valve Springs: 1.300" o.d. dual spring (TFS-16306-16) 150 lbs. @ 1.800" installed height 438 lbs. @ 1.200" open 448 lbs. per inch rate .650" maximum valve lift Rocker Arms: C00: Roller rocker arms recommended C01/C02/C03/C04: Roller rocker arms required Minimum Bore Diameter: C00: 3.780" C01: 3.900" C02: 4.000" C03/C04: 4.125" Cylinder Head Bolts/Studs: TFS-92010 (bolts) or ARP 234-4316 (studs) for pre-2004; TFS-92011 (bolts) or ARP 234-4317 (studs) for 2004 and later Head Gaskets, C00/C01: TFS-30694030-045 or TFS-30694030-051 C02/C03 Standard: TFS-30694060-045 or TFS-30694060-051 C03/C04 6-Bolt: TFS-30694125L051 and TFS-30694125R051 or TFS-30694185L051 and TFS-30694185R051 Pushrod Length: Longer than stock required Spark Plugs: NGK 4177 Viton® is a registered trademark of DuPont Performance Elastomers. Airfl ow Results GenX Cathedral Port These Trick Flow GenX cathedral port cylinder heads are fully CNC-machined to signifi cantly increase the performance of GM LS-powered vehicles. Trick Flow engineers altered the valve angles from 15° to 13.5° to decrease valve shrouding, increase mid-lift airfl ow, and improve rocker arm-to-valve cover clearance. Material added at the rocker arm mounting points increases high-RPM valvetrain stability. The spark plugs were relocated in the CNC-profi led combustion chambers to enhance mid-lift airfl ow and increase the rigidity of the casting for extreme horsepower applications. Top-of-the-line CNC Competition Ported runners have a premium high resolution surface fi nish for maximum fl ow and performance. These heads are emissions-legal under CARB E.O. #D-747 for 1997-2015 GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines. Cylinder heads are available fully assembled or as bare castings. Sold individually. GenX 205 Heads for GM LS 4.8L/5.3L/5.7L (Vortec), CNC Competition Ported Runners, Assembled TFS-30510001-C00 4.8L/5.3L/5.7L (Vortec), 205cc intake runners TFS-3051T001-C00 4.8L/5.3L/5.7L (Vortec), titanium retainers, 205cc intake runners GenX 215, 225, 235, and 245 Heads for LS1, LS2, and LSX, CNC Competition Ported Runners, Assembled TFS-30610001-C01 LS1, 215cc intake runners TFS-3061T001-C01 LS1, titanium retainers, 215cc intake runners TFS-30610001-C02 LS2, 225cc intake runners TFS-3061T001-C02 LS2, titanium retainers, 225cc intake runners TFS-3061T001-C03 LSX, titanium retainers, standard bolt pattern, 235cc intake runners TFS-3061T003-C03 LSX, titanium retainers, 6-bolt pattern, 235cc intake runners TFS-3061T003-C04 LSX, titanium retainers, 6-bolt pattern, 245cc intake runners resolution surface fi nish for maximum fl ow and performance. These heads are emissions-legal under CARB E.O. #D-747 for 1997-2015 GM vehicles with 4.8L, 5.3L, 5.7L, and 6.0L engines. TFS-30510001-C00 GenX® 205, 215, 225, 235, and 245 Cathedral Port Cylinder Heads for GM LS 408 C.I.D. + GenX ® 225 Heads = 629 HP! Mike Mavrigian of Birchwood Automotive in Creston, Ohio built Project Nighthawk, a 408 cubic inch, FAST fuel-injected LS engine based on a 6.0L cast iron block and Trick Flow’s GenX 225 cylinder heads. The engine made 629.5 peak horsepower at 6,500 RPM and 555.6 lbs.-ft. peak torque at 5,100 RPM. Everyone in the control room had huge grins every time the dyno operator blipped the throttle. Combustion Chamber
