BluePrint Builder Series LS427/800HP Standard Edition EFI Supercharged Engine and 4L80E Trans Combos BLS427SCTK4L7

BluePrint's supercharged 427 combo adds a Magnuson TVS 2.3L supercharger to the LS platform, producing 800 horsepower, with 780 lb-ft of torque on an 11.0:1 compression ratio. It pairs that blower with a 4L80E automatic transmission and a polished front accessory drive, using upgraded Mototron S107 injectors to feed the extra airflow.

Who this suits

This is the top of BluePrint's LS427 range, built for someone who wants forced induction rather than a naturally aspirated small block, while keeping an automatic transmission and LS-based engine control. The ECU arrives unlocked for dyno-shop tuning, and a drive-by-wire throttle body and an LS3-sourced intake manifold sit under the supercharger.

What to check before ordering

The supercharged combo is built around Chevrolet's LS-based 7.0L/427, produced across the 2006-2015 model years — confirm your application matches that window. The 4L80E pairs with a torque converter rated for a 3,200-plus rpm stall, well above the non-supercharged combos in this lineup, and the oil pan is a retro-fit piece built to clear most 1955-95 GM cars with the engine up front driving the rear wheels. The package is not intended for dry-sump oiling or emissions-controlled applications. Run 91-93 octane fuel with BluePrint's BPP710 oil; its matching air intake kit is worth adding so the supercharged airflow reads correctly.

Common questions

What supercharger does it use? A Magnuson TVS 2.3L unit.

Is there a flywheel in the kit? Not for this automatic combo; a flexplate handles that role instead.

Is the accessory drive polished or black? This combo ships polished; BluePrint sells the same supercharged build with a black drive too.