BluePrint Engines brings modern muscle to the forefront with this 830-horsepower LS 427 Builder Series package paired to the rock-solid 4L80E automatic transmission. Designed for drivers who want brutal power with everyday reliability, this setup features Holley’s Terminator X EFI system for dead-on fuel control, crisp throttle response, and easy tuning. The engine is built with premium internals, meticulous machining, and pro-series durability to handle hard launches, high rpm, and anything else you can throw at it. Finished with a clean natural pulley kit for a purposeful, performance-first look, this 427/4L80E combo is the ultimate turnkey LS solution for serious street or strip builds.
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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For Your Every Summer RSVP, with Code: SUMMER15
Description
4l80e transmission gear ratios GM LS Compatible 427 c.i. Engine and 4L80E Automatic TransmissionOverview: BluePrint Engines brings modern muscle to the forefront with this 830 horsepower LS 427 Builder Series package paired to the rock solid 4L80E automatic transmission. Designed for drivers who want brutal power with everyday reliability, this setup features Holleys Terminator X EFI system for dead on fuel control, crisp throttle response, and easy tuning. The engine is built with premium internals, meticulous machining, and pro series
Overview:
Description:
- Horsepower & Torque: 830 Horsepower / 800 ft. lbs. Torque
- Compression Ratio: 9.5:1
- BluePrint Engines Aluminum Heads
- BluePrint Engines Hydraulic Roller Cam
- BluePrint Engines Forged Crank
- BluePrint Engines Forged Pistons
Block:
- BluePrint Engines High Strength Cast Iron Block
- Increased Deck Thickness and Strength Webbing
- Extended Cylinder Skirt
- Priority Main Oiling
- 6-Bolt Main
- 1-Piece Rear Main Seal
- Improved Water Jacket Design
- Utilizes OEM LS3 Front and Rear Covers
Rotating Assembly:
- New Forged Crankshaft
- 4.125" Stroke
- Forged 6.125" Connecting Rods
- Forged Pistons
- Front and Rear Internally Balanced
Cylinder Heads:
- BluePrint Aluminum Cylinder Heads - PS8015
- 70cc Chamber
- 2.165" Intake / 1.590" Exhaust Valves
- 259cc Intake / 102cc Exhaust Runners
Cam Specs:
- Hydraulic Roller
- .624 Intake / .624 Exhaust Lift
- 239 Intake / 255 Exhaust Duration
- @.050-114 Degree Lobe Separation
Ignition Timing:
- ECM Supplied with Calibration
Holley Terminator X Max Specific Features and Benefits:
- Real Time Fuel Map Learning Simplifies Tuning by Dynamically Adjusting the Base Fuel Rate
- On Board Bosch LSU 4.9 Wideband Control, Enabling Accurate AFR Readings and Closed Loop Tuning
- Eight High Impedance Injector Drivers, Ideal for Stock LS Injectors and Holley EFI Injectors
- Integrated 1-Bar MAP Sensor for Naturally Aspirated or Nitrous Setups, with Harness Support for External Higher Bar Sensors if needed
- 4 Configurable Inputs (12V, Ground, 5V, Frequency) and 2 Outputs (Ground, PWM) - Ideal for Electric Fans, Boost Control Solenoids, Nitrous Control and more
- Free PC Tuning Software via USB/CAN Interface for Full Laptop Control and Advance Setup
- Integrated 3.5" Touchscreen Handheld with Setup Wizard, Internal Data Logging, and Real Time Gauge Displays
- Terminator X Max ECU will Include a Base Timing Map Pre-Configured for this engine.
Also Includes:
- 2.65 Liter Magnuson TVS 2650 Supercharger
- Upgraded Motor tron S107 Injectors
- Electronic Fuel Injection
- Coil Packs
- Valve Covers
- Oil Pan
- Drive by Wire Throttle Body
- Timing Cover
- Spark Plugs and Wires
- Harmonic Balancer
- Natural Front Accessory Drive
- LT1 Style 150-amp Alternator
- LT1 Style Water Pump
- Type II Power Steering Pump
- Compact Style A/C Compressor
Assembled with Complete HD 4l80e Transmission Package:
Includes the following:
- 4L80E Complete Package
- Electronic Transmission Controller Included
- 3200+ Stall Torque Converter
- Flex Plate
- Starter
4L80E Gear Ratios:
- 1: 2.482
- 2: 1.482
- 3: 1.00
- 4: 0.750
- R: 2.077
Notes:
- This Holley EFI Equipped engine has a fully calibrated ECU by BluePrint Engines. Please DO NOT follow the Holley EFI manual for the calibration of the ECU.
- Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars
Not for use in pollution-controlled vehicles or in dry sump applications. -
The front accessory drive on this engine fits many vehicles, however it is the customer responsibility to accurately measure and confirm fitment. Note this is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings/fabrication may be required on some vehicles.
- BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU / tuning.
- Engine/Trans Package Ships assembled
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 526 reviews
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Product Reviews
★★★★★ 5
Do away with vet teeth cleaning. Great product.
Color: Monster Bone, Size: XX-Large
My large dogs love these. It keeps their teeth clean and no tarter or cavities after 4 years of using. It has even helped an adopted older dog to have stronger teeth. They don't ingest anything, so safe to chew on.
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Reviewed in the United States on October 18, 2025
★★★★★ 4
Great for chewers
Color: Knuckle Bone, Size: XX-Large
I have a 13 month old 56 lb boxer/rottie mix who is a medium chewer and this bone is great for him. No splintering, doesn't make a mess, and hard enough to make him work without any danger of him breaking teeth, getting cut, or choking. We gave it to him a couple of weeks ago and based on wear I'm confident it will last him a long time (many months at least). I was a little hesitant about giving my animal a product that contained nylon, but after a scary experience giving a rawhide bone to a previous foster dog, I was told this was a much safer option and now I agree.
This bone is very dense and very hard, so it makes an awful noise when my dog drops it on my hardwood floor. We are also careful to make sure he doesn't drop it on our bare toes, because that would be quite unpleasant. Be aware that the chewed edges also get really rough because of the way the bone wears, so they can become a magnet for dog hairs or fabric threads. This hasn't been a problem for us (we just encourage our pup to chew it on his bed and take it away from him when we are watching a movie so the noise isn't bothersome), but it is good to know.
Update: We've had Winston for 5 months now and in that time he has gained 5 lbs of muscle. He loves his Nylabone! It is still going strong and I think he will be able to use this well through his one year adoptiversary. The only issue we have with this bone is that the edges can get sharp and sometimes will cut his mouth. He doesn't notice and just wants to keep chewing, but we usually take the bone away at that point for a bit. My boyfriend has taken the bone and used a power sander on it a few times now to remove all the sharp edges. We only have to to in once every couple of months but it makes a big difference.
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Reviewed in the United States on July 18, 2016
★★★★★ 5
Nice treat/toy
Color: Knuckle Bone, Size: XX-Large
Dogs love these.
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Reviewed in the United States on June 3, 2026
★★★★★ 5
The best toy my dog has
Color: Monster Bone, Size: XX-Large
Our lab mix is a very ambitious chewer - forget retrieving... he seems to think his "job" in life is to destroy things with his teeth. He's very methodical about it; he'll chew and chew and chew, targeting the object's weakest points, until all that remains is a littering of coin-sized remnants. He even started to make progress on his heavy duty black Kong within about a week.
By the time he was about 8 months old, we figured out that the only toys he can be left alone with are the ones made by Nylabone. He has all their models: dinosaurs, rings, small bones, and branches. These Nylabone toys are a hard plastic that chips off in tiny little shards. He's happy because he feels like he's making progress (even though it takes him a long time to do so) and we're happy because the toys last a relatively long time and he can't swallow anything that might hurt him. He does leave tiny plastic shavings on the carpet, but we have to vacuum a lot anyways because of his fur, so it's not a big deal.
Of all his Nylabone toys, this is the best (and probably his favorite of the bunch). He really likes the size - just right for him to prance around with and show off. Although he's had it for four months, it's still smooth enough in the middle that we can hold it for him comfortably, and it's retained its original shape (unlike dinosaur and branch). If we could just train him not to drop this on our feet when he wants attention(it weighs a few pounds and has gotten a bit pokey on the ends)this would be the perfect toy.
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Reviewed in the United States on August 31, 2012
★★★★★ 5
Great toy for your fur baby.
Size: Pack of 3, Color: Pacifier, Size: Pack of 3, Color: Pacifier
My husky’s all time favorite toy! He’s obsessed.
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Reviewed in the United States on April 20, 2026