GenX ® 260 Square Port Cylinder Heads for GM LS7
TFS-3271T004-C01
Specifications
Viton® is a registered trademark of DuPont Performance Elastomers.
Airflow Results
GenX 260 Square Port Lift Value .100 .200 .300 .400 .500 .600 .700
Intake Flow CFM 71 148 233 296 340 375 393
Exhaust Flow CFM 58 113 168 212 237 249 254
Tests conducted at 28" of water (pressure). Bore size: 4.125"; exhaust with 2" pipe.
GenX 260 Heads, CNC Competition Ported Runners, Assembled TFS-32710001-C01 TFS-32710002-C01 TFS-3271T001-C01 TFS-3271T002-C01 TFS-3271T003-C01
Flywheel Holding Tool Kit for GM LS
NEW!
Keep the crankshaft still so you can properly torque the harmonic balancer bolt with Trick Flow’s easy-to-use flywheel holding tool. Just as the name implies, the tool holds the flywheel still so the crankshaft can’t turn and the TFS-90326 harmonic balancer bolt can be tightened to the correct torque specs. The tool is even-slotted so it can be used on engines mounted to an engine stand or installed in a vehicle, even if the engine has been swapped into an older chassis. Contents include the slotted flywheel holding tool, two spacers, two M10 x 1.5 x 80mm long bolts, and two 10mm flat washers. TFS-90326
GM LS
Material: A356-T61 aluminum Combustion Chamber Volume: 70cc CNC-profiled Intake Port Volume: 260cc CNC Competition Ported Intake Port Location: Stock LS7 Intake Port Dimensions: 2.400" x 1.370" LS7 square port Intake Gaskets: GM 89017852 Intake Valve Diameter: 2.200" (TFS-32700211) Intake Valve Seat: Ductile iron (TFS-53400271) Exhaust Port Volume: 87cc CNC Competition Ported Exhaust Port Location: Stock LS7 Exhaust Port Dimensions: 1.460" x 1.700" oval Exhaust Gaskets: GM 12582179 Exhaust Valve Diameter: 1.600" (TFS-32600212) Exhaust Valve Seat: Ductile iron (TFS-30600272-1) Valve Angles: 12° Valve Guide Material: Trick-Alloy powdered metal (TFS-30700252) Valve Seals: Viton® fluoroelastomer canister (TFS-30600455) Valve Seat Angles: 45° x multi-angle Valve Spring Pocket Diameter: 1.480" Valve Spring I.D. Locators: 1.300" Valve Spring Retainers: Steel (TFS-21400410); titanium (TFS-214T0415) Valve Stem Locks: 7° steel (TFS-30600444) Valve Springs, Standard: 1.300" o.d. dual spring (TFS-16904-16) 150 lbs. @ 1.800" installed height 400 lbs. @ 1.200" open 370 lbs. per inch rate .625" max. valve lift Valve Springs, Optional: 1.300" o.d. dual spring (TFS-16306-16) 155 lbs. @ 1.820" installed height 465 lbs. @ 1.200" open 448 lbs. per inch rate .650" max. valve lift Rocker Arms: OEM LS7 with upgraded bearings or roller rocker arms Minimum Bore Diameter: 4.100" Cylinder Head Bolts/Studs: TFS-92010 (bolts) or ARP 234-4316 (studs) for early LS engine blocks; TFS-92011 (bolts) or ARP-234-4317 (studs) for late LS engine blocks Head Gaskets: TFS-30694160-045 or TFS-30694160-051 Pushrod Length: Longer than stock required Spark Plugs: NGK 4177 NOTES: Assembled cylinder heads include rocker arm rail mount (TFS-326LS3).
GM LS fans, here is a sure-fire formula for making more power: Big bore LS engine + Trick Flow GenX 260 LS7 cylinder heads = huge power in a lightweight package. Trick Flow’s GenX 260 square port aluminum cylinder heads for GM LS7 are designed to meet the needs of enthusiasts using any LS-based engine block with a minimum bore diameter of 4.100". To improve the factory design, Trick Flow added more material to the A356-T61 aluminum castings for increased rigidity and strength. Then Trick Flow improved the valvetrain system by integrating modular one-piece, 2024T4 billet aluminum rocker arm mounts that are removable for high-end shaft rocker setups. Trick Flow’s high flow/high velocity CNC Competition Ported runners with the premium high resolution surface finish provide all-out air flow and performance throughout the entire powerband. Other major improvements include the available 6-bolt per cylinder clamping for GMPP LSX and other aftermarket engine blocks, clearance for 3/8" pushrods, through-deck coolant holes to fit all GM LS gasket and block combinations, Trick-Alloy powdered-metal valve guides, solid stem valves, and two Trick Flow by PAC Racing Pacaloy™ valve spring packages. Trick Flow GenX 260 square port cylinder heads for GM LS7 work with all LS7-style intake manifolds. The heads maintain the factory intake and exhaust port locations, valve angles, and valve locations so they work with existing LS7-based pistons. Fully assembled cylinder heads include valve springs, steel or titanium spring retainers, die forged steel valve locks, and valves. GenX 260 heads are emissions-legal under CARB E.O. #D-747 for 2006-present GM vehicles with 7.0L engines. The cylinder heads are available fully assembled or as bare castings. Sold individually.
Flywheel holding tool kit, each
TFS-3271T004-C01
1.300" dual valve springs (370 lbs./in.), 260cc intake runners 1.300" dual valve springs (448 lbs./in.), 260cc intake runners 1.300" dual valve springs (370 lbs./in.) and titanium retainers, 260cc intake runners 1.300" dual valve springs (448 lbs./in.) and titanium retainers, 260cc intake runners 1.300" dual valve springs (370 lbs./in.), titanium retainers, and 6-bolt mounting pattern, 260cc intake runners 1.300" dual valve springs (448 lbs./in.), titanium retainers, and 6-bolt mounting pattern, 260cc intake runners
Cylinder Head Bolt Kits for GM LS Keep combustion where it belongs! Trick Flow’s high-quality cylinder head bolt kits provide consistent clamping force from bolt-to-bolt. 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. TFS-92010 TFS-92011
Cylinder head bolt kit, pre-2004 long style, torque-to-yield, each Cylinder head bolt kit, 2004 and later short style, torque-to-yield, each
TFS-92010
Phone: 1-330-630-1555 • Fax: 1-330-633-2504 • TrickFlow.com Phone: 1300 350 351
Fax: 1300 350 454
Web: www.fabre.com.au
Email: info@fabre.com.au
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