A suped up 5.3 that is ready and willing to deliver
Continuing the tradition of great small-block V-8 engines, the 5.3L LS engine has been one of the most popular we've ever built. It's been installed in millions of GM-built pickups, work trucks, vans, and SUV's. But, leave it to the GM Performance Parts engineers to go one step further and upgrade the 5.3L LS. The result is a High Output 5.3 that is just as capable serving as a workhorse - it's just a little bit more fun.
We started with the base engine - the tough, proven, and dependable 5.3L engine. It's the same long-lived production engine that you'll find in our award winning full-sized truck and SUV line. The stock 5.3 offers a dependable 295 horsepower and 325 lb.-ft of torque from the 96mm bore by 92mm stroke engine design.
What makes our 5.3 High Output crate engine so special is that our engineers added a GM Performance Parts custom cam and Grafal-coated pistons. With these simple upgrades, the 5.3 HO kicks out 327 horsepower and 347 lb.-ft of torque. And, just like the stock 5.3, the 5.3 HO is capable of thousands of miles of dependable service while returning outstanding fuel mileage, thanks to the superior design of the LS Family of engines.
This crate engine is a " Drop-in" replacement for the 1999 - 2006 LM7 5.3L V8 found in the 1999-2006 C&K full size trucks.
Power: 327 HP @5500 RPM, 347 ft. lbs. of torque @ 4600 RPM
Displacement: 327 CID, 5.3L
Bore x Stroke: 3.78” x 3.62”
Compression Ratio: 9.5:1
Recommended Fuel: 87 Octane
Block: Cast Iron, with 6 bolt, cross-bolted iron caps
Crankshaft: Nodular Iron
Connecting Rods: Powdered Metal Steel
Pistons: Hypereutectic Aluminum
Camshaft: Hydraulic Roller Tappet
Cam Lift: .467” Intake / .479” exhaust
Cam Duration @ .050”: 196deg. Intake / 201 deg. Exhaust
Lobe Separation: 116 Degree
Cylinder Heads: Aluminum Cathedral Port
Combustion Chamber: N/A
Valves: 1.89” Intake/ 1.55” Exhaust
Rocker Arms: Cast Roller, 1.7:1 Ratio
Maximum GM Recommended RPM: 6000
• Fully GM assembled long block
• Cast OE valve covers
• Cast OE valley cover
• Oil pump, pick-up and Truck-Style oil pan
• Front timing cover
• Truck Water Pump
• Harmonic Balancer-Pulley
General Motors limited 2 year / 50,000 mile parts & labor warranty. Click on Document tab above for full details.
Related Engines and Components:
Fully Assembled 5.3L Carbureted Turn-Key Crate Engine
Fully Assembled 5.3L with Dual Quad Carbs and Polished Finish Crate Engine
24X Engine Controller
Edelbrock LS 4 barrel Intake with Engine Controller Package
GMP-12499529-C 290HP Fully Assembled Retro-Style Crate Engine
LS Engine Swap Mounts and Conversion Kits
GM LS Engine Serpentine Drive Packages
LS Engine to SBC and BBC Auto Trans Conversion Kit
Complete LS Engine 4 and 5 speed manual trans conversion packages
LS Engine Swap Oil Pan Packages
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