BluePrint Engines Pro Series Chevy LS 427 C.I.D. 625 HP EFI Retrofit Dressed Long Block Crate Engine — PSLS4272CTF
625 horsepower of LS fury — the biggest-cube LS crate engine in the BluePrint Pro Series. The PSLS4272CTF stretches the LS architecture to 427 cubic inches of 7.0L dominance: forged crank, forged rods and forged Mahle 11.0:1 pistons under aluminum LS3-pattern heads, a .624″-lift hydraulic roller cam, and a fabricated aluminum EFI intake with injectors, coils and oil pan already installed. Dyno-proven at 625 HP and 565 lb-ft, documented per engine, and backed by BluePrint’s 30-month/50,000-mile warranty. Crated and shipped fast across Europe from NH Race Engine.
Why Choose the BluePrint PSLS4272CTF LS Crate Engine?
There’s a reason 427 is the most famous displacement in Chevy history — and this is how you get it with modern LS engineering. Where the LS3 stops at 376 cubes, the Pro Series 427 adds forged everything, real compression and a cam with actual personality. The result is 625 naturally-aspirated horsepower that pulls from idle to 7,000 rpm — pro-touring levels of performance in a package lighter than any big block.
“Retrofit dressed” means the tedious work is done: fabricated aluminum intake, throttle body, fuel injectors, coil packs, oil pan and front timing cover installed at the factory. You add an ECU and harness of your choice — the 58X reluctor pattern pairs perfectly with a Holley Terminator X, which we can supply calibrated — plus your fuel system, headers and transmission. Your dyno sheet ships in the crate: 625 HP is your engine’s documented number, not a catalog claim.
LS Crate Engine Key Features & Benefits
- 625 HP / 565 TQ — Dyno-Proven: Run and documented on BluePrint’s dyno. Your sheet ships with the crate.
- 427 cu in / 7.0L Stroker: The biggest displacement in the Pro Series LS line — big block torque in a small block package.
- Forged Rotating Assembly: Forged steel crank, forged 6.125″ I-beam rods, forged Mahle 11.0:1 pistons with Grafal-coated skirts.
- .624″ Lift Hydraulic Roller Cam: Real powerband personality with street-manageable manners and zero lash maintenance.
- Aluminum LS3-Pattern Heads: Modern chamber design with massive aftermarket support — bolt-ons galore.
- EFI Retrofit Dressed: Fabricated aluminum intake, throttle body, injectors, coil packs, oil pan and front cover installed.
- 58X Reluctor Pattern: Modern crank signal for today’s best standalone ECUs.
- 30-Month / 50,000-Mile Warranty: Industry-leading coverage, supported in Europe by NH Race Engine.
LS Crate Engine Recommended Applications
The PSLS4272CTF suits builds where an LS3 isn’t enough and a big block is too much:
- Pro Touring: Chevelles, Camaros, Novas — autocross-ready power with modern reliability
- C10 & Square-Body Truck LS Swaps: 565 lb-ft transforms a hauler — LS weight keeps the nose light
- Restomods: Modern drivability with genuine big-cube character
- Street Performance: Naturally-aspirated 625 HP — no blower complexity, no heat soak
- Engine Building Platform: Forged internals and 11.0:1 leave sensible headroom for nitrous or boost
Not included: ECU and wiring harness (58X — we recommend and supply Holley Terminator X, calibrated), fuel tank and EFI-rated pump, fuel lines, battery, headers and exhaust, transmission and flexplate.
Technical Specifications
| Part Type: | High Performance Crate Engine — EFI Retrofit Dressed Long Block |
| Product Line: | BluePrint Engines Pro Series LS (427) |
| MPN: | PSLS4272CTF |
| Summit Part No.: | MLL-PSLS4272CTF |
| Power: | 625 HP / 565 lb-ft (dyno-proven with documentation) |
| Displacement: | 427 cu in / 7.0L |
| Block: | LS-pattern (aluminum or BluePrint high-strength casting — confirm at order), 1-piece rear seal |
| Crankshaft: | Forged steel, 4.125″ stroke |
| Connecting Rods: | Forged I-beam, 6.125″ |
| Pistons: | Forged Mahle 11.0:1, Grafal-coated skirts |
| Camshaft: | Hydraulic roller, .624″ lift |
| Cylinder Heads: | Aluminum LS3/L92-pattern |
| Induction: | Fabricated aluminum EFI intake, throttle body & injectors — installed |
| Reluctor: | 58X (24X-58X compatible controllers) |
| Ignition: | Coil-near-plug packs — installed |
| Recommended Fuel: | 91+ octane (Euro 98–99 RON minimum) |
| Warranty: | 30 months / 50,000 miles |
| Assembled: | Yes — EFI retrofit dress, sold individually |
What’s Included vs. What You Supply
| Component | Included | You Supply |
|---|---|---|
| 427 LS block, forged rotating assembly | ✅ | — |
| Aluminum LS3 heads & roller valvetrain | ✅ | — |
| Hydraulic roller cam & lifters | ✅ | — |
| Fabricated aluminum intake & throttle body | ✅ | — |
| Fuel injectors & rail | ✅ | — |
| Coil packs & harness | ✅ | — |
| Oil pan & front cover | ✅ | — |
| ECU & main harness (58X controller) | — | ✅ — we supply Terminator X calibrated |
| Water pump & pulleys | — | ✅ |
| Harmonic balancer | — | ✅ |
| Fuel tank, EFI pump & lines (58+ PSI) | — | ✅ |
| Headers & exhaust | — | ✅ |
| Flexplate / flywheel & transmission | — | ✅ |
LS3 vs LS 427 vs 572 — BluePrint Ladder, Top to Bottom
| Feature | PSLS3760CTFKB (LS3) | PSLS4272CTF (This Engine) | PS5720CT (Big Block) |
|---|---|---|---|
| Power | 530 HP / 495 TQ | 625 HP / 565 TQ | 745 HP / 710 TQ |
| Displacement | 376 cu in / 6.2L | 427 cu in / 7.0L | 572 cu in / 9.4L |
| Block | Cast iron | LS-pattern | Tall deck iron |
| EFI status | Terminator X Max included | Induction installed — add ECU | You supply induction |
| Best for | Best value per HP, boost-ready iron | Max NA power, pro touring | Maximum everything |
Frequently Asked Questions
Is this an LS7?
No — and we’re upfront about it. The PSLS4272CTF is an LS3-style 427 stroker (LS-pattern block, LS3-pattern heads) making 625 HP. A genuine LS7 is the Corvette Z06’s factory 7.0L with unique heads and titanium valves. If you specifically need an LS7, contact us and we’ll source one. If you want 7.0 liters of forged, dyno-proven LS power, this is the better-value answer.
What ECU does it need?
The 58X reluctor pairs with any 58X-capable standalone — we recommend and supply the Holley Terminator X, calibrated for this cam and displacement. It controls the injectors, coils and (with the transmission variant) 4L60E/4L80E transmissions. Budget one afternoon for wiring.
Can 11.0:1 run on European fuel?
Yes on 98–99 RON premium — the same fuel this engine was dyno’d on. If you only have access to 95 RON, talk to us before ordering; a compression or cam discussion may apply.
What transmission survives 565 lb-ft?
A built 4L60E (upgraded), 4L80E, T56 Magnum or TR6060. The Terminator X transmission variant controls 4L60E/4L80E without a separate controller. Tell us your goals and we’ll spec converter stall and gearing.
Is the warranty valid in Europe?
Yes — BluePrint’s 30-month/50,000-mile warranty is supported in Europe through NH Race Engine directly. Full terms ship with your crate.
Recommended Companion Products
- Holley Terminator X (58X) — calibrated for this engine
- EFI fuel systems — 58+ PSI pumps, lines, tanks
- LS swap headers & exhaust
- LS swap mounts, pans & conversion parts
- Pro touring cooling packages
- 4L80E / T56 Magnum transmissions
- Break-in oil & assembly lubricant
- BluePrint LS3 crate engine — 530 HP with EFI included
- BluePrint PS5720CT — 745 HP big block crate engine
- All crate engines — remanufactured & high performance
Shipping Your LS Crate Engine Across Europe
NH Race Engine ships BluePrint LS crate engine packages across Europe from our EU warehouse. Engines ship crated on a pallet via insured freight carrier with full tracking — dyno sheet, EFI documentation and warranty paperwork included.
Estimated delivery: Netherlands 3–5 business days | Germany, Belgium, France 5–7 business days | Rest of EU 7–10 business days
Liftgate delivery available on request. Contact us for a freight quote to your address or workshop.
Order Your BluePrint PSLS4272CTF LS Crate Engine Today
625 naturally-aspirated horsepower, forged internals, induction installed — the BluePrint PSLS4272CTF LS crate engine is the pro-touring answer to the question every build eventually asks: “what’s next after the LS3?”
Contact our technical team with your vehicle and build goals for a complete package quote — including calibrated ECU — or click “Add to Cart” now to secure yours.
SKU: BPE-PSLS4272CTF | MPN: PSLS4272CTF | Brand: BluePrint Engines | Category: High Performance Crate Engines / Pro Series LS
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