ZZ6 EFI Deluxe (420 hp) Connect & Cruise Crate Powertrain System with T56 Manual Transmission


  • 420 hp @ 5,800 rpm
  • 408 lb.-ft. @ 4,500 rpm
  • 9,72:1 compression ratio
  • Deluxe includes the distributor, damper and flexplate
  • T56 six-speed manual transmission
REBATE AVAILABLE: $500/$750/$1,000 Prepaid VISA Gift Card From Chevrolet Performance. See 'Rebate' tab below for details.

Shipping is free, but there is a delivery fee for residential addresses.

SKU: CPSZZ6EFIT56 Categories: , Tag:

ZZ6 EFI Deluxe Connect & Cruise Powertrain with T56 Transmission

Engine Specs:

  • ZZ6 EFI Deluxe (350 cu. in.)
  • 420 hp @ 5,800 rpm
  • 408 lb.-ft. @ 4,500 rpm
  • 9.72:1 compression ratio
  • 62 cc Fast Burn heads (2.000 intake / 1.550 exhaust valves)
  • 1.5:1 ratio roller rocker arms
  • .474 intake / .510 exhaust camshaft lift

Transmission Specs:

  • T56 Super Magnum six-speed manual
  • 26-spline input shaft, 31-spline output shaft
  • Slip-yoke design
  • New synchronizers featuring fine tooth angles
  • Bolstered one-piece countershaft to resist distortion
  • Re-designed shift forks
  • Gear ratios: 1st-2.66, 2nd-1.78, 3rd-1.30, 4th-1.00, 5th-0.80, 6th-0.63)
  • 33.6 inches long (approx)

More about Connect & Cruise Crate Powertrain Systems

The Complete Performance Package!

When it comes to factory-engineered performance and convenience, nothing beats Chevrolet Performance’s industry-exclusive Connect & Cruise powertain systems. With one package you get the engine and automatic or manual transmission and, we deliver it for less than the cost of buying the components separately.

Our engineers matched the engines and transmissions for optimal performance and durability, so you can wring out every horsepower with total confidence! The specially calibrated controllers for fuel-injected engines are designed for retrofit installations in older vehicles, for easier and quicker installation – and more importantly – operation without the need for third-party tuning.

We did the work to design and calibrate perfectly matched powertrain systems and covered them with a 24-month / 50,000-mile limited warranty.

Chevrolet Performance pioneered the performance crate engine, so when it comes to performance innovations that save time, money and guesswork, we once again lead the way! All you have to do is install, connect, and start cruising!

NOTE: All components, engine, transmission, controllers and installation kits (where applicable) are ordered and delivered separately.


ZZ6 EFI Deluxe Connect & Cruise Powertrain with T56 Manual Transmission

CPSZZ6EFI4L65E System Components:

  • 19368149 Engine
  • 19352208 Transmission
  • 19320990 Transmission Installation Kit

Modern Performance with Classic Style

Chevrolet Performance’s ZZ6 EFI crate engine blends the timeless style of the classic 350 Small-Block with modern, electronically controlled port fuel injection.

The key is the unique induction system, which features port injectors mounted on an aluminum intake manifold that has the appearance of a carbureted intake. A fuel injection throttle body mounted in place of the carburetor allows a traditional air cleaner to be installed on the engine.

As with our other ZZ6 crate engines, the cylinder heads are based on the proven Fast Burn design, with large intake runners and 2.00/1.55-inch valves. Beehive-style valve springs enable greater high-rpm performance and durability. They allow the ZZ6 to rev higher to make the most of every cubic inch of air drawn through it.

The ZZ6 also uses an aggressive hydraulic roller camshaft that supports the engine’s high-rpm airflow capability while maintaining excellent low-speed drivability. It all adds up to a thoroughly modern Small-Block that looks right at home under the hood of your vintage Camaro, Chevelle, Corvette and more. A simple plug-and-play control system rounds out the package to get the engine running in your project without the need for third-party tuning.

The Deluxe crate engine kit includes the distributor, damper and flexplate.


ZZ6 EFI Deluxe Connect & Cruise with T56 Transmission

Click here to download installation information.

ZZ6 EFI Deluxe Connect & Cruise with T56 Transmission

Chevrolet Performance Connect & Cruise Powertrain Systems include a 24-month or 50,000-mile (80,000 kilometer) limited warranty on all components.

Click here for more detailed warranty information.

This product qualifies for a $500/$750/$1,000 Rebate from Chevrolet Performance.

To receive the rebate:

  1. Purchase a select Chevrolet Performance Connect & Cruise System between 1/1/2024 and 12/31/2024
  2. Complete all information requested on this form and mail it by January 31st, 2025, OR
  3. Submit your rebate online at before the same deadline

See rebate form for more details.

NOTE: Please allow up to 6-8 weeks for rebate processing.


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Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to