During the development stage, Trick Flow engineers determined that the valve angles needed to change from 15* to 13.5*. This change decreased valve shrouding, increased mid-lift airflow, and increased rocker arm-to-valve cover clearance. Testing also proved that relocating the spark plug position in the combustion chamber further enhanced combustion along with mid lift airflow and improved the integrity of the casting in the chamber area. Trick Flow also added additional material to the decks (.600") and to the rocker arm mounting pads to improve high rpm valve train stability.

These new fully CNC-ported heads feature 215cc intake runners, 80cc exhaust runners, 64cc combustion chambers, 2.040" intake valves, 1.575"exhaust valves, bronze valve guides, and ductile iron intake and exhaust seat inserts.

Assembled heads come equipped with stainless steel intake and exhaust valves, 1.300" dual extreme pressure (150# seat 450# open) valve springs for lifts up to .650", viton seals, machined spring locators, 7 degree titanium retainers and machined steel locks.

One last important feature of this 13.5* head design is the valve drop. This head features a .155" valve drop on the intake, a stock 5.7 head with 2.00" valves has around .150". What this means is you can run this head on stock pistons with large camshafts and still have more piston to valve clearance than a stock head and also more compression.

Note: A roller tipped rocker and .100” longer than stock pushrod is required with these heads. 

FREE SHIPPING!

Cylinder Head Style:	Assembled
Cylinder Head Material:	Aluminum
Cylinder Head Finish:	Natural
Combustion Chamber Volume (cc):	65 or 70
CNC-Machined Combustion Chamber:	Yes
Intake Runner Volume (cc):	225cc
Exhaust Runner Volume (cc):	80cc
CNC-Machined Intake Runner:	Yes
CNC-Machined Exhaust Runner:	Yes
Intake Port Shape:	Cathedral
Intake Port Location:	Standard
Exhaust Port Shape:	Oval
Exhaust Port Location:	Standard
Intake Valves Included:	Yes
Intake Valve Diameter (in):	2.055 in.
Exhaust Valves Included:	Yes
Exhaust Valve Diameter (in):	1.575 in.
Valve Springs Included:	Yes
Maximum Valve Lift (in):	0.650 in.
Outside Diameter of Outer Spring (in):	1.300 in.
Damper Spring Included:	No
Number of Springs Per Valve:	Dual
Retainers Included:	Yes
Retainer Material:	Titanium
Locks Included:	Yes
Lock Style:	7 degree
Valve Stem Seals Included:	Yes
Valve Stem Seal Style:	Viton® fluoroelastomer
Rocker Arm Studs Included:	No
Rocker Arms Included:	No
Rocker Arm Nuts Included:	No
Guideplates Included:	No
Valve Cover Mounting Style:	Centerbolt
Accessory Bolt Holes Drilled:	Yes
Intake Valve Angle:	13.5
Exhaust Valve Angle:	13.5
Valve Guides Included:	Yes
Valve Guide Material:	Bronze
Valve Seats Machined:	Yes
Valve Seat Machine Style:	3-angle
Valve Seat Material:	Ductile iron
Steam Holes Drilled:	No
Oiling Style:	Through pushrod
Machined for O-Ring:	No
Heat Crossover:	No
Quantity:	Sold as a pair.
Notes:	Must be used with roller rocker arms.

During the development stage, Trick Flow engineers determined that the valve angles needed to change from 15* to 13.5*. This change decreased valve shrouding,increased mid-lift airflow, and increased rocker arm-to-valve cover clearance. Testing also proved that relocating the spark plug position in the combustion chamber further enhanced combustion along with mid lift airflow and improved the integrity of the casting in the chamber area. Trick Flow also added additional material to the decks (.600") and to the rocker arm mounting pads to improve high rpm valve train stability.

The 225 LS-2 heads feature all of the same design advantages of the LS-1 with the addition of a 4.00" bore combustion chamber, 2.055" intake valve, 225cc intake runner, and a 65cc combustion chamber volume. We also offer a 70cc chamber option for forced induction applications.

Assembled heads come equipped with stainless steel intake and exhaust valves, 1.300" dual extreme pressure (150# seat 450# open) valve springs for lifts up to .650", viton seals, machined spring locators, 7 degree titanium retainers and machined steel locks.

One last important feature of this 13.5* head design is the valve drop. This head features a .155" valve drop on the intake, a stock 5.7 head with 2.00" valves has around .150". What this means is you can run this head on stock pistons with large camshafts and still have more piston to valve clearance than a stock head and also more compression.

Note: A roller tipped rocker and .100” longer than stock pushrod is required with these heads.

FREE SHIPPING!

Note: A roller tipped rocker and .100” longer than stock pushrod is required with these heads. Minimum recommended bore size is 4.030".

FREE SHIPPING!

Trick Flow GenX (TM) Street/Strip 245 Cylinder Heads for GM LSX
Cylinder Head, GenX Street/ Strip CNC, Aluminum, Assembled, GM, LS, Pair


Flow Data

245cc Flow Data
	Intake	Exhaust
0.1	69	56
0.2	146	130
0.3	237	201
0.4	294	249
0.5	336	269
0.55	348	273
0.6	353	276
Tested on 4.185" bore @28"

During the development stage, Trick Flow engineers determined that the valve angles needed to change from 15* to 13.5*. This change decreased valve shrouding,increased mid-lift airflow, and increased rocker arm-to-valve cover clearance. Testing also proved that relocating the spark plug position in the combustion chamber further enhanced combustion along with mid lift airflow and improved the integrity of the casting in the chamber area. Trick Flow also added additional material to the decks (.600") and to the rocker arm mounting pads to improve high rpm valve train stability.

Fully assembled with Ferrea valves, titanium retainers, Gold Extreme springs (hyd roller), machined steel locks.

Our biggest cathedral port offering, this is a larger version of our 235 head which uses 2.100" and 1.600" valves. Optimized for large bore (4.155" and up) larger cubic inch strokers. 70cc chamber is standard.
Combine this with an LSX block and build the ultimate large cubic inch monster. 

Note: A roller tipped rocker and .100” longer than stock pushrod is required with these heads. 

FREE SHIPPING!

The 265cc Drag head. Our largest offering in a Cathedral
Port design. Built using Trickflow's newest "R-LSX"
casting. The casting has raised spring pockets,rocker pads,
and valve cover rails to allow for high lift cams and valve
train components it. It is only avaialble is a 6 bolt version.
This head is designed for drag race only and uses our
competition only 55* Valve job and Titanium intake valve.
This creates great airflow benefits at high valve lifts-
(.700-Up). We also assemble this head using the best
components - Victory-1 valves, .800" PAC springs, and
Manley Retainers, locks, and locators. We also can custom
build any combinattion you request too. Options like
beryllium copper seats, Springs-PSI, Comp, Nextek, etc.
are available.

Harmonic dampers from the horsepower experts at Trick Flow.
Trick Flow® Track Max® harmonic dampers are engineered to meet the needs of high-revving, late model vehicles like yours. These SFI-18.1 rated carbon steel dampers contain an injection-molded and bonded elastomer and feature engraved timing marks for easy adjustment.

Installation Instructions
TFSUDPulley.pdf

NOTE
Requires a new Serpentine Belt & A/C Belt.