LS3 525HP Engine and T56 Transmission Package

The Ohio Speed Shops LS3 525HP Engine and T56 Transmission Package is a comprehensive performance upgrade, featuring a meticulously assembled and dyno-tested LS3 engine and a Tremec T56 6-speed manual transmission. This package is built to order, allowing for personalized options to meet specific build requirements. The LS3 engine boasts a 376 cubic inch (6.2L) aluminum block, producing 525 horsepower at 6200 RPM and 486 ft-lbs of torque at 5200 RPM. Key specifications include a hydraulic roller camshaft with .525" lift, a 10.7:1 compression ratio requiring 91 octane fuel, and a maximum recommended RPM of 6600. The package includes a Holley Terminator X EFI system with a 3.5" touchscreen, a 1000cfm throttle body, 42lb injectors, and a CVF Racing 8-rib serpentine drive system with A/C, power steering, and a 140amp alternator. The included Tremec T56 Magnum 6-speed transmission is rated for 700 ft-lbs of torque and features a 2.66 ratio in first gear and a .63 ratio in sixth for excellent drivability and highway cruising. It comes complete with an aluminum LS/LT bellhousing, a McLeod RST twin-disc clutch, a steel flywheel, and a hydraulic slave cylinder. The transmission details highlight its precise engagement, low-effort throws, and 4616 chromoly gears and shafts. Ohio Speed Shops emphasizes that engines are built as ordered, with customizable options including engine trim, serpentine drive configuration, paint color, and oil pan selection. The product also includes free 48-state truck freight shipping and an initial engine break-in on the dyno. Note that this package is designed for custom applications, and specific YMM T56 swap packages are available upon direct contact.