BluePrint 427 C.I. Supercharged LS Engine & Bowler Tru-Street 4L80E Transmission Package

**60 DAY LEAD TIME**

When serious horsepower meets proven durability, you get a performance package built to deliver. Combining the incredible power of BluePrint Engines' 427 C.I. Pro Series LS-compatible engine with the strength and reliability of Bowler's Tru-Street 4L80E automatic transmission, this package brings together two performance powerhouses for one exceptional drivetrain combination.

At the heart of this package is BluePrint's supercharged 427 C.I. LS-compatible engine, producing an impressive 860 horsepower and 810 ft-lbs of torque. Built around a high-strength cast iron LSX-style block, this engine features forged internal components, BluePrint aluminum cylinder heads, a hydraulic roller camshaft, and a Gen 6 3.0L Whipple supercharger. With a 9.5:1 compression ratio and Holley's Terminator X Max EFI system, it delivers serious power backed by advanced engine management technology. Real-time fuel map learning, precise air/fuel ratio monitoring, and an included 3.5" touchscreen handheld make tuning and monitoring more convenient than ever.

Handling all that horsepower is Bowler's Tru-Street 4L80E 4-speed automatic performance transmission, engineered with upgraded components to provide dependable performance under demanding conditions. Featuring a billet 300M input shaft, high-energy friction plates, an updated 34-element intermediate sprag, increased clutch pressure, and a blueprinted valve body and pump, this transmission is built with strength, durability, and consistent performance in mind. Each transmission is thoroughly inspected and dyno tested by Bowler to ensure the quality and dependability our customers expect.

Completing the combination is Bowler's 265mm billet triple-disc lockup torque converter, featuring brazed fins and a billet apply piston. Converter stall speed is tailored to the vehicle's specifications, with options ranging from 2,400 to 4,500 RPM, helping deliver a combination suited to your individual build.

Whether you're putting together a high-horsepower street machine, a custom hot rod, or your next performance project, this BluePrint and Bowler package combines exceptional engine performance with the trusted craftsmanship and durability of a Bowler transmission.

Package Highlights

• Engine: BluePrint Engines 427 C.I. Pro Series LS-Compatible V8

• Power: 860 HP / 810 ft-lbs of Torque

• Supercharger: Gen 6 3.0L Whipple

• Engine Management: Holley Terminator X Max EFI with 3.5" Touchscreen

• Engine Construction: High-Strength Cast Iron Block, Forged Crankshaft, Connecting Rods & Pistons

• Transmission: Bowler Tru-Street GM 4L80E 4-Speed Automatic

• Transmission Upgrades: Billet 300M Input Shaft, High-Energy Frictions, Upgraded Sprags & Blueprinted Valve Body

• Torque Converter: 265mm Billet Triple-Disc Lockup Converter

• Converter Stall Options: 2,400–4,500 RPM, Built to Vehicle Specifications

• Quality Assurance: Bowler Inspected & Dyno Tested Transmission

Important Information

• The transmission portion of this package does not include a separate transmission controller, fill tube, transmission cooler, slip yoke, driveshaft, flexplate, crossmember, fluid, or additional installation accessories.