600hp LS3 427ci 7.0ltr V8 Gen4 Holden Chev street race
Horsepower World 427ci LS3 7.0ltr Engine 600hp

This is our tough street/strip 427ci-600hp LS3 engine


For Serious Hot Rod, Tough Street, Street-Strip and High Performance Cruising.


LS3 Alloy Block
Callies Forged 4.10" Crank
Callies Forged H-Beam Rods
Mahle Forged Pistons
Mast 3-Bolt Core Custom Grind Hydraulic Roller Camshaft
LS3 Hydraulic Roller Lifters
Cloyes Roller Timing Chain Set
Mast Motorsports LS3/L92 CNC Ported Aluminum Heads
Stainless Steel Intake Valves / Inconel Exhaust Valves
Mast Nitrided Beehive Roller Springs
ARP Head Studs & Main Studs
GM/Mast Roller Rockers
Manley Chromemoly (1) Piece Pushrods
Cometic MLS Head Gaskets
Ignition Coils
This hand built LS3 based engine utilizes a camshaft that has a strong lope that creates great mid and high RPM power for the customer that will be aggressively racing their vehicle, but still wants great street manors for a daily driver. This engine also provides the massive torque output that only a bigger cube engine can.

We can certainly upgrade this engine to a much higher performance level or we can build any engine for you to suit exactly what you want to do. Please call with any questions and for best pricing or if you need any performance engine for any application.

Here at Horsepower World we have a huge range of LS engines for many applications with a range of sizes from 400ci to over 454ci, Supercharged & Natrually Aspirated!

Please call with any enquiries.

The LS3 427’s heart and soul is the new 4.065 aluminum block. The LS3 designation has a HPW engineered camshaft that is custom ground on a LS3 cam core. The 427 foundation is a honed and decked LS3 aluminum block with a 4.100” forged Callies rotating assembly with Mahle pistons that is topped off with Mast CNC LS3/L92 heads and a LS3 intake manifold.

600hp LS3 427ci 7.0ltr V8 Gen4 Holden Chev street