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 GenX® Top-End Engine Kits for GM LS GenX Top-End Engine Kit Dyno Results TFS-K306-485-460 TFS-K306-500-460 TFS-K306-515-460 TFS-K306-550-470 TFS-K305-455-425 TFS-K326-580-520 GenX Top-End Engine Kits for GM LS Don’t waste time trying to figure out which parts you need to get the performance you want—Trick Flow has already done the work for you! Trick Flow’s GenX top-end engine kits for GM LS are designed and dyno-tested to deliver the performance you want for less than purchasing the parts separately. Each kit includes a pair of Trick Flow GenX CNC Competition Ported cylinder heads, a specially matched Track Max® hydraulic roller cam, Harland Sharp roller rocker arms (except TFS-K326-580-520), heat-treated chromoly pushrods, performance head and exhaust gaskets, Trick Flow head bolts, and balancer bolt. GenX top-end kits are not recommended for vehicles with flex fuel or active fuel management. Tuning is required for maximum performance. NOTE: The top-end kit for GM LS3 (TFS-K326-580-520) does not include roller rocker arms. It is recommended that builders use OEM rocker arms with upgraded bearings. GenX Top-End Engine Kits for GM LS1 TFS-K306-485-460 Top-end engine kit, 485 HP/460 lbs.-ft. torque, each TFS-K306-500-460 Top-end engine kit, 500 HP/460 lbs.-ft. torque, each TFS-K306-515-460 Top-end engine kit, 515 HP/460 lbs.-ft. torque, each NOTE: These kits were dyno-tested on a stock GM 5.7L LS1 short block with 10.5:1 compression, Trick Flow GenX 215 cathedral port cylinder heads (TFS-3060T001-C01), Track Max hydraulic roller cam (TFS-30602001, TFS-30602002, or TFS-30602003, depending on application), and an LS6 intake manifold. 1997-98 engines require centerbolt valve covers (sold separately). GenX Top-End Engine Kit for GM LS2 TFS-K306-550-470 Top-end engine kit, 550 HP/470 lbs.-ft. torque, each NOTE: This kit was dyno-tested on a GM 6.0L LS2 short block with 10.86:1 compression, Trick Flow GenX 225 cathedral port cylinder heads (TFS-3060T001-C02), Track Max hydraulic roller cam (TFS-30602004), stock intake manifold with 90mm throttle body, Kooks headers with 13⁄4" primaries, and dual exhaust with 3" Flowmaster mufflers. GenX Top-End Engine Kit for GM LS3 TFS-K326-580-520 Top-end engine kit, 580 HP/525 lbs.-ft. torque, each NOTE: This kit was dyno-tested on a GM 6.2L LS3 short block with 10.43:1 compression, Trick Flow GenX 255 square port cylinder heads (TFS-3261T002-C01), Trick Flow Track Max hydraulic roller cam (TFS-32603001), stock L92 intake manifold with 90mm throttle body, Kooks headers with 17⁄8" primaries, and dual exhaust with 3" Flowmaster mufflers. GenX Top-End Engine Kit for GM LS Truck TFS-K305-455-425 Top-end engine kit, 455 HP/425 lbs.-ft. torque, each NOTE: This kit was dyno-tested on a GM Performance Parts LS327 short block engine with Trick Flow GenX 205 cathedral port cylinder heads (TFS-30500001-C00), Track Max hydraulic roller cam (TFS-30602001), chromoly pushrods (TFS-21407500), Harland Sharp roller rocker arms, and stock GM LS truck intake manifold and 78mm throttle body. TFS-K306-550-470
