LS3 263cc CNC PORTED

$2,500.00

Designed for LS short-blocks with 4.000″ bore or larger

The 6-Bolt design is compatible with GM LSX and World LSX blocks
Available in 4 bolt design (Stock blocks)
Billet Rocker Stands
Accepts Gen IV LS3 valvetrain and intake manifolds
Uses a 2.165″ SS intake valve and SS 1.600″ exhaust valve
Ti and Inconel Valves Available
11 Degree valve angle
263cc CNC intake port
105cc CNC exhaust port
Has a 69cc CNC ported combustion chamber
Deck thickness of .750″

Springs/Retainers

BTR Platinum LS Dual Springs .660″ Lift (SK001)
.650 Max Lift recommended
.565″ ID Locator for Bronze Valve Guide
Viton high heat seal
GM Valve Lock
Chromoly Retainers
155 lbs @ 1.780″ 380 lbs @ 1.180″ 400 lbs @ 1.130 Coil bind @ 1.070″

Valves

Intake Valves: 2.165 x 5.45″
Exhaust Valves: 1.60 x 5.45″

Flow Bench: Superflo SF-102

Flow Plate Bore: 4.125″ @28″ H2O

Lift

.200″
.300″
.400″
.500″
.600″
.650″

Intake Flow

160 CFM
228 CFM
283 CFM
328 CFM
354 CFM
370 CFM

Exhaust Flow

114 CFM
158 CFM
191 CFM
222 CFM
241 CFM
247 CFM

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