 SharkWerks GT3 3.9L Upgrade Product Type: Engine Application: 997 GT3 | 997 GT3RS 996 GT3 Price:Call for latest price  Press Coverage SharkWerks and Evolution Motorsports have once again collaborated to develop a full 3.9L engine conversion for the venerable Porsche 997 GT3 motor. Tuned in the extreme heat of Arizona on EVOMS' Mustang Dyno the 3.9L engine conversion brings up the horsepower from a factory 3.6's 385rwhp (415hp) to 458rwhp (502hp) and from 274rwtq (300tq) to 326rwtq (355tq). The EVOMSit software (featuring IST and SP) is calibrated for either 91 or 93 octane levels. With more than fifty foot pounds of torque made available in the lower rpm range as well as an additional 70plus HP in the higher RPMS the character of the motor is amplified and even extended by an additional 400rpms. Utilizing our light-weight Piston kit we are also able to improve upon the already-quick throttle response and revs to an even more lively level."This 3.9 vanquishes every GT3 flat six I’ve tried. ... Put simply, it’s the best normally-aspirated flat six I’ve tried." -Excellence Magazine, April 2010 Features: SharkWerks/EVO Piston & Cylinder Kit - 3.9L SharkWerks/EVO Head Stud Kit SharKWerks/EVO Spec Intake & Exhaust Camshafts Tuning: EVOMSit Engine Software for 91 Octane or 93 Octane Exhaust: SharkWerks Center Exhaust Kit (SharkWerks/EVO Light-Weight Cup-Style System also available at extra cost) Top End Build Kit: -Cylinder Base Gaskets -Head Gaskets -Cam Tower Gaskets Billet Lightweight Crankshaft Pulley Lightweight RS Flywheel Conversion (not required for RS model cars) Option 2 (for higher mileage cars we also provide a bottom end build at additional cost) Balance Rotating Assembly: -Crankshaft -Flywheel -Rods -Pulley Bottom End Rebuild Kit: -Main Bearings -#8 Nose Bearing -Rear Main Seal  See the feature in Excellence Magazine, and on World Car Fans.
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